Do a full scan

Similar Questions

• My pc crashes every time after updateding or play a game like worlds of war crartf and I ran a full scan and no theats ideals?

  My pc crashes every time after updateding or play a game like worlds of war crartf and I ran a full scan and no theats ideals?

  Check the download site of the manufacture of the graphics card for the latest Windows 7 drivers for your card.

  ATI: http://support.amd.com/us/gpudownload/Pages/index.aspx

  NVIDIA: http://www.nvidia.com/Download/index5.aspx?lang=en-us

  JS
  http://www.PAGESTART.com

  Never be afraid to ask. This forum has some of the best people in the world to help.

• Auto weekly full scan never start despite all the settings are correct

  I use XP and I was using AVG which I could always count on doing my Automatic weekly Full Scan. I've been using Microsoft Security Essentials since the beginning of the summer, but I'm a little worried it won't kick and do my weekly analysis automatically. I always have to do it manually. Is this a common problem, I know two other people with the same problem. I double checked all the settings and everything is as it should be.

  Hello

  Getting started with Microsoft Security Essentials
  Refer (Scheduling scans) links
  http://Windows.Microsoft.com/en-us/Windows/getting-started-with-security-essentials
  If you got the question, then you uinstall and resinstall Microsoft Security Essentials
  Protect your PC
  Download Microsoft Security Essentials for the low price, low free.
  http://Windows.Microsoft.com/en-us/Windows/Security-Essentials-download
  Help protect your PC with Microsoft Security Essentials
  http://www.Microsoft.com/security/PC-security/MSE.aspx

• problem of mshwkorr.dll gel full scans

  Hi, someone help with this problem:-running full on either Ms security esentials scan or an anti-malware program to C:\Program Files\Common Files\Microsoftshared\ink\mshwkorr.dll is scanned it little stops the analysis to which all programs gel including the Task Manager. Other anti-spyware/virus programs either do not actually analyze the file or if it is accepted.  This has happened for several weeks.  Not sure it's the scanner or the files at the root of the problem.

  Hi Chris,

  A box pop up came on the Windows screen saying to another disk check (which several already finished because of the forced, which had fixed some small errors) and check both boxes.

  I followed the instructions and it was specifically this file in the windows winsxs folder and fix the bad clusters.  No other signs of problems I have therefore been able to run a full scan on both my usual programs anti-virus and antimalaware and they both ended with no sign of any attack.  So I'm a happy Bunny!

  Thanks a lot for all your help and your time.

  Thanks also to a different Chris (?) TJs) who put a list for someone else on the measures to be taken to check your hard drive, including the verification of drivers and the dust in the computer.  It can be a factor for me that the machine worked hot lately and I have pet hair!

  Thans again, you are all very useful for us and our computers mistreated.

  SOUL

• My windows Defender cannot be turned on. The error code is 0x800106ba. I did a full scan with no viruses or errors.

  Windows Defender (vista) cannot be turned on.  Errow code is 0x800106ba.  When I found this, I did the full scan by using the Microsoft Security Enssentials.  There is no virus or error appears.  What could be wrong?  Thanks for any help.

  MS Security Essentials, which apparently you have installed your anti-virus/security protection, has its own component antimalware and disables Windows Defender when it is installed correctly. If your system works as expected. MS - MVP - Elephant Boy computers - don't panic!

• When I run a full scan on McAfee, I find myself with a potentially unwanted program cannot remove McAfee

  original title: adware a step/remove

  When I run a full scan on McAfee, I find myself with a potentially unwanted program cannot remove McAfee. How can I remove this program without having to buy the software warranty?

  Hello

  Download update and scan with the free version of malwarebytes anti-malware

  http://www.Malwarebytes.org/MBAM.php

  You can also download and run rkill to stop the process of problem before you download and scan with malwarebytes

  http://www.bleepingcomputer.com/download/anti-virus/rkill

  If it does not remove the problem and or work correctly in normal mode do work above in safe mode with networking

  Windows Vista

  Using the F8 method:

  1. Restart your computer.
  2. When the computer starts, you will see your computer hardware are listed. When you see this information begins to tap theF8 key repeatedly until you are presented with theBoot Options Advanced Windows Vista.
  3. Select the Safe Mode with networking with the arrow keys.
  4. Then press enter on your keyboard to start mode without failure of Vista.
  5. To start Windows, you'll be a typical logon screen. Connect to your computer and Vista goes into safe mode.
  6. Do whatever tasks you need and when you are done, reboot to return to normal mode.

• I'm running a full scan of the system with my anti-virus software and it filled almost my laptop crashes, problem with the vga865.fon file

  I'm running a full scan of the system with my anti-virus software and it filled almost my laptop breaks down when it comes to: -.

  c:\windows\winsxs\x86_microsoft-Windows-font-bitmap-oem_31bf3856ad364e35_6.0.6000.16386_none_fb2d5aefb17b8d65\vga865.FON

  This file can be replaced.  When I scan this folder individually its fine, please help

  Thank you

  Hello

  What protection software antivirus you are running on the computer?

  Method 1: Check if you can run the scan in safe mode without in all questions

  Follow the steps mentioned in the link below to access the secure mode
  Startup options (including safe mode)

  Method 2: you can run Safe Mode security monitor, see the steps in the article below
  How to install the free Windows Live OneCare Safety Scanner and then scan your computer in Mode safe

  Method 3: Follow the steps mentioned in the link below to check your hard disk for errors, and then check if the problem is resolved
  Check your hard drive for errors

  If the problem persists,

  Method 4: Long file name could cause this problem, perform a backup of the file (copy it somewhere else), and then rename the file, check to see if that makes a difference

  Note: Copy the file to the original location.

  Thank you, and in what concerns:

  Ajay K

  Microsoft Answers Support Engineer
  ***************************************************************************
  Visit our Microsoft answers feedback Forum and let us know what you think.

• When you run a full scan on windows 7, it can take up to 9 hours.

  I noticed that it takes up to 9 hours to run a full scan in windows 7. Windows Installer seems to be very important when it comes to scanning, as well as others. Is there a way to clean up some of these files, as well as the analysis does not take as long? Or 9 hours an acceptable amount of time to run a scan completes. It seems more 1 million files, is this normal?

  Hello GarryHall,

  The analysis of the file system by using a virus scanner can take hours depending on the number of installed software and drivers. If you have many programs installed on your system, it can really take a lot of time. There is nothing bad about it.

• Microsoft Security Essentials Full Scan is turned off

  When I try to run a full scan, analysis is constantly interrupted because the screen switches to switch users.
  I have all the options changed forever energy saving.  I keep having to go back to my computer to use the
  Scan and it takes all day.
  Thank you for your help.

  Hello

  Make sure that you have disabled "On summary, display logon" in the Windows settings.

  1. go in the 'Control Panel '.
  2. click on "appearance and personalization".
  3. click on "change screen saver.
  4 uncheck "on summary, the logon screen.

  This will not allow the computer to enter the lock screen, when it is idle.

  About the analysis of taking security over time to complete, here are some links Microsoft Community that will help you.

  http://answers.Microsoft.com/en-us/protect/Forum/MSE-protect_scanning/time-for-the-full-system-scan-too-long/0946caf5-6421-4829-b657-cf13aef188cf

  http://answers.Microsoft.com/en-us/protect/Forum/MSE-protect_scanning/how-long-should-a-full-scan-take/6e0258a0-857E-E011-9b4b-68b599b31bf5

  Hope this information helps. If you have any questions, please let us know.

• Windows Essential slow full scan

  Why the full scan takes 9 hours? Why when analysis indicates through the complete green line continues? It is impractiocal since I never leave my computer on more than 4 hours.

  I would uninstall Security Essentials, reboot and then reinstall. See if that helps.

  It depends on the size/number of files as to how long the analysis will take.

• Product Norton does not allow me to run a full scan of the system.

  Original title: program compatibility Application Applications App Apps game games Legacy Crash crashes Hang hangs

  I am running Windows 7 Home premium and my Norton product does not allow me to run a full scan of the system. Norton is active (I have the green box, etc) but as soon as I click on the Norton, the menu icon options initially displays for a few seconds then drops away.  I can live updates and quick scans.

  Hi Brian,.

  Thanks for the post.

  You can try to resolve the problem by uninstalling and reinstalling Norton; but I woould season contact you Norton Support to better provide assistance to this topic.

  https://support.Norton.com/SP/en/us/home/current/info

  I hope this helps.

• When Oracle make Index Fast full Scan?

  Hi all

  In this case, Oracle index full scan. Please give the solution with at least two example.

  Thank you

  Oops,

  Spleen it was INDEX FAST FULL SCAN. Then index must be greater:

  SQL > create table tbl in select * from dba_objects;

  Table created.

  SQL > alter table tbl
  2 edit object_name not null;

  Modified table.

  SQL > create index tbl_idx1 on tbl (object_name);

  The index is created.

  SQL > explain the plan for
  2. Select object_name in tbl;

  He explained.

  SQL > select * from table (dbms_xplan.display);

  PLAN_TABLE_OUTPUT
  ----------------------------------------------------------------------------------
  Hash value of plan: 2675010997

  ---------------------------------------------------------------------------------
  | ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time |
  ---------------------------------------------------------------------------------
  |   0 | SELECT STATEMENT |          | 69022 |  4448K |   109 (1) | 00:00:02 |
  |   1.  FULL RESTRICTED INDEX SCAN FAST | TBL_IDX1 | 69022 |  4448K |   109 (1) | 00:00:02 |
  ---------------------------------------------------------------------------------

  Note
  -----

  PLAN_TABLE_OUTPUT
  ----------------------------------------------------------------------------------
  -dynamic sample used for this survey (level = 2)

  12 selected lines.

  SQL >

  SY.

• Difference between Index Full Scan, and Scan select Index Full

  Quick Index Full Scan is an example of Index Full Scan, then what are the differences between Fast Full Index Scan and Index Full Scan. I have traveled the official documentation, but found it a bit complex, that no simple explanation will be great. Thanks in advance!

  Go to http://tahiti.oracle.com, select database Oracle 11g Release 2 (11.2) enter fast full scan small index in the 'Search' box, you may decide to read the results of three or four, but the fourth is setting performance Guide: the query optimizer

  Repeat the process for the analysis of comprehensive index of search term.

  Concerning

  Jonathan Lewis

• Query not using Full Scan Index

  Hello world

  I'm on 11.2.0.3.0 AIX 6.1.

  There is a query such as:

  Select: sys_b_0 | Count (distinct (column_name)) table;

  that goes for the analysis full table. The column was values separate only 104 with not NULL values. To save memory buffer gets, I created an index on the table with the column used in the query (i.e. whose distinct values are recovered).

  The problem is that even after the creation of indexes and force the flag index that it does not use the full scan of the index. The provided indication is correct in syntax and was the only clue in the query, so there is no question of conflicts with others.

  Can anyone suggest me what I might be missing?

  Thank you

  It seems to me that if print_branch_code is defined as nullable in the table. If this is the case, the optimizer goes for a sweep of index, even if there is no real NULL values

• Why the optimizer ignores Index Fast full Scan when much lower cost?

  Summary (tracking details below) - to improve the performance of a query on more than one table, I created an index on a table that included all the columns referenced in the query. With the new index in place the optimizer is still choosing a full Table Scan on an Index fast full scan. However, by removing the one query tables I reach the point where the optimizer suddenly use the Index Fast Full Scan on this table. And 'Yes', it's a lot cheaper than the full Table Scan it used before. By getting a test case, I was able to get the motion down to 4 tables with the optimizer still ignoring the index and table of 3, it will use the index.
  
  So why the optimizer not chooses the Index Fast Full Scan, if it is obvious that it is so much cheaper than a full Table Scan? And why the deletion of a table changes how the optimizer - I don't think that there is a problem with the number of join permutations (see below). The application is so simple that I can do, while remaining true to the original SQL application, and it still shows this reversal in the choice of access path. I can run the queries one after another, and he always uses a full Table Scan for the original query and Index fast full scan for the query that is modified with a table less.
  
  Watching trace 10053 output for the two motions, I can see that for the original query 4 table costs alone way of ACCESS of TABLE UNIQUE section a full Table Scan. But for the modified query with a table less, the table now has a cost for an Index fast full scan also. And the end of the join cost 10053 does not end with a message about exceeding the maximum number of permutations. So why the optimizer does not cost the IFFS for the first query, when it does for the second, nearly identical query?
  
  This is potentially a problem to do with OUTER joins, but why? The joins between the tables do not change when the single extra table is deleted.
  
  It's on 10.2.0.5 on Linux (Oracle Enterprise Linux). I did not define special settings I know. I see the same behavior on 10.2.0.4 32-bit on Windows (XP).
  
  Thank you
  John
  Blog of database Performance
  
  DETAILS
  I've reproduced the entire scenario via SQL scripts to create and populate the tables against which I can then run the queries. I've deliberately padded table so that the length of the average line of data generated is similar to that of the actual data. In this way the statistics should be similar on the number of blocks and so forth.
  
  System - uname - a

  Linux mysystem.localdomain 2.6.32-300.25.1.el5uek #1 SMP Tue May 15 19:55:52 EDT 2012 i686 i686 i386 GNU/Linux

  Database - v$ version

  Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - Prod
  PL/SQL Release 10.2.0.5.0 - Production
  CORE    10.2.0.5.0      Production
  TNS for Linux: Version 10.2.0.5.0 - Production
  NLSRTL Version 10.2.0.5.0 - Production

  Original query (complete table below details):

  SELECT 
      episode.episode_id , episode.cross_ref_id , episode.date_required , 
      product.number_required , 
      request.site_id 
  FROM episode 
  LEFT JOIN REQUEST on episode.cross_ref_id = request.cross_ref_id 
       JOIN product ON episode.episode_id = product.episode_id 
  LEFT JOIN product_sub_type ON product.prod_sub_type_id = product_sub_type.prod_sub_type_id 
  WHERE (
          episode.department_id = 2
      and product.status = 'I'
        ) 
  ORDER BY episode.date_required
  ;

  Execution of display_cursor after the execution plan:

  SQL_ID  5ckbvabcmqzw7, child number 0
  -------------------------------------
  SELECT     episode.episode_id , episode.cross_ref_id , episode.date_required ,
  product.number_required ,     request.site_id FROM episode LEFT JOIN REQUEST on
  episode.cross_ref_id = request.cross_ref_id      JOIN product ON episode.episode_id =
  product.episode_id LEFT JOIN product_sub_type ON product.prod_sub_type_id =
  product_sub_type.prod_sub_type_id WHERE (         episode.department_id = 2 and
  product.status = 'I'       ) ORDER BY episode.date_required
  
  Plan hash value: 3976293091
  
  -----------------------------------------------------------------------------------------------------
  | Id  | Operation             | Name                | Rows  | Bytes |TempSpc| Cost (%CPU)| Time     |
  -----------------------------------------------------------------------------------------------------
  |   0 | SELECT STATEMENT      |                     |       |       |       | 35357 (100)|          |
  |   1 |  SORT ORDER BY        |                     | 33333 |  1920K|  2232K| 35357   (1)| 00:07:05 |
  |   2 |   NESTED LOOPS OUTER  |                     | 33333 |  1920K|       | 34879   (1)| 00:06:59 |
  |*  3 |    HASH JOIN OUTER    |                     | 33333 |  1822K|  1728K| 34878   (1)| 00:06:59 |
  |*  4 |     HASH JOIN         |                     | 33333 |  1334K|       |   894   (1)| 00:00:11 |
  |*  5 |      TABLE ACCESS FULL| PRODUCT             | 33333 |   423K|       |   103   (1)| 00:00:02 |
  |*  6 |      TABLE ACCESS FULL| EPISODE             |   299K|  8198K|       |   788   (1)| 00:00:10 |
  |   7 |     TABLE ACCESS FULL | REQUEST             |  3989K|    57M|       | 28772   (1)| 00:05:46 |
  |*  8 |    INDEX UNIQUE SCAN  | PK_PRODUCT_SUB_TYPE |     1 |     3 |       |  0   (0)|          |
  -----------------------------------------------------------------------------------------------------
  
  Predicate Information (identified by operation id):
  ---------------------------------------------------
     3 - access("EPISODE"."CROSS_REF_ID"="REQUEST"."CROSS_REF_ID")
     4 - access("EPISODE"."EPISODE_ID"="PRODUCT"."EPISODE_ID")
     5 - filter("PRODUCT"."STATUS"='I')
     6 - filter("EPISODE"."DEPARTMENT_ID"=2)
     8 - access("PRODUCT"."PROD_SUB_TYPE_ID"="PRODUCT_SUB_TYPE"."PROD_SUB_TYPE_ID")

  Updated the Query:

  SELECT 
      episode.episode_id , episode.cross_ref_id , episode.date_required , 
      product.number_required , 
      request.site_id 
  FROM episode 
  LEFT JOIN REQUEST on episode.cross_ref_id = request.cross_ref_id 
       JOIN product ON episode.episode_id = product.episode_id 
  WHERE (
          episode.department_id = 2
      and product.status = 'I'
        ) 
  ORDER BY episode.date_required
  ;

  Execution of display_cursor after the execution plan:

  SQL_ID  gbs74rgupupxz, child number 0
  -------------------------------------
  SELECT     episode.episode_id , episode.cross_ref_id , episode.date_required ,
  product.number_required ,     request.site_id FROM episode LEFT JOIN REQUEST on
  episode.cross_ref_id = request.cross_ref_id      JOIN product ON episode.episode_id =
  product.episode_id WHERE (         episode.department_id = 2     and product.status =
  'I'       ) ORDER BY episode.date_required
  
  Plan hash value: 4250628916
  
  ----------------------------------------------------------------------------------------------
  | Id  | Operation              | Name        | Rows  | Bytes |TempSpc| Cost (%CPU)| Time     |
  ----------------------------------------------------------------------------------------------
  |   0 | SELECT STATEMENT       |             |       |       |       | 10515 (100)|          |
  |   1 |  SORT ORDER BY         |             | 33333 |  1725K|  2112K| 10515   (1)| 00:02:07 |
  |*  2 |   HASH JOIN OUTER      |             | 33333 |  1725K|  1632K| 10077   (1)| 00:02:01 |
  |*  3 |    HASH JOIN           |             | 33333 |  1236K|       |   894   (1)| 00:00:11 |
  |*  4 |     TABLE ACCESS FULL  | PRODUCT     | 33333 |   325K|       |   103   (1)| 00:00:02 |
  |*  5 |     TABLE ACCESS FULL  | EPISODE     |   299K|  8198K|       |   788   (1)| 00:00:10 |
  |   6 |    INDEX FAST FULL SCAN| IX4_REQUEST |  3989K|    57M|       |  3976   (1)| 00:00:48 |
  ----------------------------------------------------------------------------------------------
  
  Predicate Information (identified by operation id):
  ---------------------------------------------------
     2 - access("EPISODE"."CROSS_REF_ID"="REQUEST"."CROSS_REF_ID")
     3 - access("EPISODE"."EPISODE_ID"="PRODUCT"."EPISODE_ID")
     4 - filter("PRODUCT"."STATUS"='I')
     5 - filter("EPISODE"."DEPARTMENT_ID"=2)

  Creating the table and Population:
  1 create tables
  2. load data
  3 create indexes
  4. collection of statistics
  

  --
  -- Main table
  --
  create table episode (
  episode_id number (*,0),
  department_id number (*,0),
  date_required date,
  cross_ref_id varchar2 (11),
  padding varchar2 (80),
  constraint pk_episode primary key (episode_id)
  ) ;
  --
  -- Product tables
  --
  create table product_type (
  prod_type_id number (*,0),
  code varchar2 (10),
  binary_field number (*,0),
  padding varchar2 (80),
  constraint pk_product_type primary key (prod_type_id)
  ) ;
  --
  create table product_sub_type (
  prod_sub_type_id number (*,0),
  sub_type_name varchar2 (20),
  units varchar2 (20),
  padding varchar2 (80),
  constraint pk_product_sub_type primary key (prod_sub_type_id)
  ) ;
  --
  create table product (
  product_id number (*,0),
  prod_type_id number (*,0),
  prod_sub_type_id number (*,0),
  episode_id number (*,0),
  status varchar2 (1),
  number_required number (*,0),
  padding varchar2 (80),
  constraint pk_product primary key (product_id),
  constraint nn_product_episode check (episode_id is not null) 
  ) ;
  alter table product add constraint fk_product 
  foreign key (episode_id) references episode (episode_id) ;
  alter table product add constraint fk_product_type 
  foreign key (prod_type_id) references product_type (prod_type_id) ;
  alter table product add constraint fk_prod_sub_type
  foreign key (prod_sub_type_id) references product_sub_type (prod_sub_type_id) ;
  --
  -- Requests
  --
  create table request (
  request_id number (*,0),
  department_id number (*,0),
  site_id number (*,0),
  cross_ref_id varchar2 (11),
  padding varchar2 (80),
  padding2 varchar2 (80),
  constraint pk_request primary key (request_id),
  constraint nn_request_department check (department_id is not null),
  constraint nn_request_site_id check (site_id is not null)
  ) ;
  --
  -- Activity & Users
  --
  create table activity (
  activity_id number (*,0),
  user_id number (*,0),
  episode_id number (*,0),
  request_id number (*,0), -- always NULL!
  padding varchar2 (80),
  constraint pk_activity primary key (activity_id)
  ) ;
  alter table activity add constraint fk_activity_episode
  foreign key (episode_id) references episode (episode_id) ;
  alter table activity add constraint fk_activity_request
  foreign key (request_id) references request (request_id) ;
  --
  create table app_users (
  user_id number (*,0),
  user_name varchar2 (20),
  start_date date,
  padding varchar2 (80),
  constraint pk_users primary key (user_id)
  ) ;
  
  prompt Loading episode ...
  --
  insert into episode
  with generator as 
  (select rownum r
            from (select rownum r from dual connect by rownum <= 1000) a,
                 (select rownum r from dual connect by rownum <= 1000) b,
                 (select rownum r from dual connect by rownum <= 1000) c
           where rownum <= 1000000
         ) 
  select r, 2,
      sysdate + mod (r, 14),
      to_char (r, '0000000000'),
      'ABCDEFGHIJKLMNOPQRSTUVWXYZ' || to_char (r, '000000')
    from generator g
  where g.r <= 300000
  /
  commit ;
  --
  prompt Loading product_type ...
  --
  insert into product_type
  with generator as 
  (select rownum r
            from (select rownum r from dual connect by rownum <= 1000) a,
                 (select rownum r from dual connect by rownum <= 1000) b,
                 (select rownum r from dual connect by rownum <= 1000) c
           where rownum <= 1000000
         ) 
  select r, 
         to_char (r, '000000000'),
         mod (r, 2),
         'ABCDEFGHIJKLMNOPQRST' || to_char (r, '000000')
    from generator g
  where g.r <= 12
  /
  commit ;
  --
  prompt Loading product_sub_type ...
  --
  insert into product_sub_type
  with generator as 
  (select rownum r
            from (select rownum r from dual connect by rownum <= 1000) a,
                 (select rownum r from dual connect by rownum <= 1000) b,
                 (select rownum r from dual connect by rownum <= 1000) c
           where rownum <= 1000000
         ) 
  select r, 
         to_char (r, '000000'),
         to_char (mod (r, 3), '000000'),
         'ABCDE' || to_char (r, '000000')
    from generator g
  where g.r <= 15
  /
  commit ;
  --
  prompt Loading product ...
  --
  -- product_id prod_type_id prod_sub_type_id episode_id padding 
  insert into product
  with generator as 
  (select rownum r
            from (select rownum r from dual connect by rownum <= 1000) a,
                 (select rownum r from dual connect by rownum <= 1000) b,
                 (select rownum r from dual connect by rownum <= 1000) c
           where rownum <= 1000000
         ) 
  select r, mod (r, 12) + 1, mod (r, 15) + 1, mod (r, 300000) + 1,
         decode (mod (r, 3), 0, 'I', 1, 'C', 2, 'X', 'U'),
         dbms_random.value (1, 100), NULL
    from generator g
  where g.r <= 100000
  /
  commit ;
  --
  prompt Loading request ...
  --
  -- request_id department_id site_id cross_ref_id varchar2 (11) padding 
  insert into request
  with generator as 
  (select rownum r
            from (select rownum r from dual connect by rownum <= 1000) a,
                 (select rownum r from dual connect by rownum <= 1000) b,
                 (select rownum r from dual connect by rownum <= 1000) c
           where rownum <= 10000000
         ) 
  select r, mod (r, 4) + 1, 1, to_char (r, '0000000000'),
  'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01234567890123456789' || to_char (r, '000000'),
  'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789012345678' || to_char (r, '000000')
    from generator g
  where g.r <= 4000000
  /
  commit ;
  --
  prompt Loading activity ...
  --
  -- activity activity_id user_id episode_id request_id (NULL) padding 
  insert into activity
  with generator as 
  (select rownum r
            from (select rownum r from dual connect by rownum <= 1000) a,
                 (select rownum r from dual connect by rownum <= 1000) b,
                 (select rownum r from dual connect by rownum <= 1000) c
           where rownum <= 10000000
         ) 
  select r, mod (r, 50) + 1, mod (r, 300000) + 1, NULL, NULL
    from generator g
  where g.r <= 100000
  /
  commit ;
  --
  prompt Loading app_users ...
  --
  -- app_users user_id user_name start_date padding 
  insert into app_users
  with generator as 
  (select rownum r
            from (select rownum r from dual connect by rownum <= 1000) a,
                 (select rownum r from dual connect by rownum <= 1000) b,
                 (select rownum r from dual connect by rownum <= 1000) c
           where rownum <= 10000000
         ) 
  select r, 
         'User_' || to_char (r, '000000'),
         sysdate - mod (r, 30),
         'ABCDEFGHIJKLMNOPQRSTUVWXYZ' || to_char (r, '000000')
    from generator g
  where g.r <= 1000
  /
  commit ;
  --
  
  prompt Episode (1)
  create index ix1_episode_cross_ref on episode (cross_ref_id) ;
  --
  prompt Product (2)
  create index ix1_product_episode on product (episode_id) ;
  create index ix2_product_type on product (prod_type_id) ;
  --
  prompt Request (4)
  create index ix1_request_site on request (site_id) ;
  create index ix2_request_dept on request (department_id) ;
  create index ix3_request_cross_ref on request (cross_ref_id) ;
  -- The extra index on the referenced columns!!
  create index ix4_request on request (cross_ref_id, site_id) ;
  --
  prompt Activity (2)
  create index ix1_activity_episode on activity (episode_id) ;
  create index ix2_activity_request on activity (request_id) ;
  --
  prompt Users (1)
  create unique index ix1_users_name on app_users (user_name) ;
  --
  prompt Gather statistics on schema ...
  --
  exec dbms_stats.gather_schema_stats ('JB')

  10053 sections - original query

  ***************************************
  SINGLE TABLE ACCESS PATH
    -----------------------------------------
    BEGIN Single Table Cardinality Estimation
    -----------------------------------------
    Table: REQUEST  Alias: REQUEST
      Card: Original: 3994236  Rounded: 3994236  Computed: 3994236.00  Non Adjusted: 3994236.00
    -----------------------------------------
    END   Single Table Cardinality Estimation
    -----------------------------------------
    Access Path: TableScan
      Cost:  28806.24  Resp: 28806.24  Degree: 0
        Cost_io: 28738.00  Cost_cpu: 1594402830
        Resp_io: 28738.00  Resp_cpu: 1594402830
  ******** Begin index join costing ********
    ****** trying bitmap/domain indexes ******
    Access Path: index (FullScan)
      Index: PK_REQUEST
      resc_io: 7865.00  resc_cpu: 855378926
      ix_sel: 1  ix_sel_with_filters: 1
      Cost: 7901.61  Resp: 7901.61  Degree: 0
    Access Path: index (FullScan)
      Index: PK_REQUEST
      resc_io: 7865.00  resc_cpu: 855378926
      ix_sel: 1  ix_sel_with_filters: 1
      Cost: 7901.61  Resp: 7901.61  Degree: 0
    ****** finished trying bitmap/domain indexes ******
  ******** End index join costing ********
    Best:: AccessPath: TableScan
           Cost: 28806.24  Degree: 1  Resp: 28806.24  Card: 3994236.00  Bytes: 0
  ***************************************

  10053 - updated the Query

  ***************************************
  SINGLE TABLE ACCESS PATH
    -----------------------------------------
    BEGIN Single Table Cardinality Estimation
    -----------------------------------------
    Table: REQUEST  Alias: REQUEST
      Card: Original: 3994236  Rounded: 3994236  Computed: 3994236.00  Non Adjusted: 3994236.00
    -----------------------------------------
    END   Single Table Cardinality Estimation
    -----------------------------------------
    Access Path: TableScan
      Cost:  28806.24  Resp: 28806.24  Degree: 0
        Cost_io: 28738.00  Cost_cpu: 1594402830
        Resp_io: 28738.00  Resp_cpu: 1594402830
    Access Path: index (index (FFS))
      Index: IX4_REQUEST
      resc_io: 3927.00  resc_cpu: 583211030
      ix_sel: 0.0000e+00  ix_sel_with_filters: 1
    Access Path: index (FFS)
      Cost:  3951.96  Resp: 3951.96  Degree: 1
        Cost_io: 3927.00  Cost_cpu: 583211030
        Resp_io: 3927.00  Resp_cpu: 583211030
    Access Path: index (FullScan)
      Index: IX4_REQUEST
      resc_io: 14495.00  resc_cpu: 903225273
      ix_sel: 1  ix_sel_with_filters: 1
      Cost: 14533.66  Resp: 14533.66  Degree: 1
  ******** Begin index join costing ********
    ****** trying bitmap/domain indexes ******
    Access Path: index (FullScan)
      Index: IX4_REQUEST
      resc_io: 14495.00  resc_cpu: 903225273
      ix_sel: 1  ix_sel_with_filters: 1
      Cost: 14533.66  Resp: 14533.66  Degree: 0
    Access Path: index (FullScan)
      Index: IX4_REQUEST
      resc_io: 14495.00  resc_cpu: 903225273
      ix_sel: 1  ix_sel_with_filters: 1
      Cost: 14533.66  Resp: 14533.66  Degree: 0
    ****** finished trying bitmap/domain indexes ******
  ******** End index join costing ********
    Best:: AccessPath: IndexFFS  Index: IX4_REQUEST
           Cost: 3951.96  Degree: 1  Resp: 3951.96  Card: 3994236.00  Bytes: 0
  ***************************************

  I mentioned that it is a bug related to the ANSI SQL standard and transformation probably.

  As suggested/asked in my first reply:
  1. If you use a no_query_transformation then you should find that you get the use of the index (although not in the plan you would expect)
  2. If you use the traditional Oracle syntax, then you should not have the same problem.