Codes 646 and 643: Windows Update encountered an unknown error

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• Windows Update: failed. __Code 643 windows Update encountered an unknown error. _ * AND * __I cannot repair Windows 7 with the disc either. My guess is: these issues are related...? __

  I have THREE questions which PEUVENT all be linked togther... What do you think?

  [I am slot as Windows 7 Ultimate (free upgrade to Dell PC w/purchase) on a Dell 64 bit PC XPS435]
  I've upgraded from Vista about 3 weeks ago.

  #1 - Two weeks ago I had a problem with the installation of Nero/LiquidTV-TiVo to my PC... (this is also when the problem started).
  To get the "Nero" thing figured out, I took the advice of someone on the Forum/Blog of Nero. The person has provided a lenghty explanation how to uninstall LiquidTV completely by removing the registry files... I don't really know what I'm doing in the registry, but everything that I helped my problem of Nero, but I couldn't tell you WHAT I deleted OR if I have deleted any bad subfolders or whatnot!... the next time I started my PC is when the NEW NUMBER is right.

  #2 - On my next BOOT, Windows Update has found an IMPORTANT update:

  A security update for Microsoft XML Core Services 4.0 Service Pack 2 for x 64 systems (KB954430)

  .. .and it fails every time, it tries to install saying this:

  Windows Update - failed

  Code 643 Windows Update encountered an unknown error.

  "Get help with this error" provides little or no help... but it says this:
   "WindowsUpdate_00000643" "WindowsUpdate_dt000"
  
  All the research I did, the problem seems to be with Microsoft .NET Framework... .and all the solutions I found talking about it, "UNINSTALL all THE .NET FRAMEWORK & REINSTALL" ... I tried and there is no .NET Frameworks listed in Add/Remove, and when I press on ' VIEW INSTALLED UPDATES'... " on my PC it says, "no updates are installed on this computer"... what the _____?

  #3 - Today, I thought I would just pop the WINDOWS 7 installation disc and do a repair/upgrade... It will not be upgraded.
  He cycles most of the way through, then he Has STOPPED and says this:

  The following problems prevent upgrade Windows. Cancel the upgrade, perform each task, (it lists only a SINGLE task), and then restart the upgrade to continue.

  • Windows needs to be restarted if necessary to system files can be changed before you continue.

    Does not help restart. He tried 3 times and he ends up doing the same thing.
    Is it possible I deleted something out of the register so far here and which is cause of all this?
    If so, is it possible to fix WITHOUT doing a new install of Windows 7?
    OR... anything can be a problem... Please HELP!

    (And please note: I am a first year student college with specialization in computer science... but I just started last semester, so I don't know what I should... yet. - though, I SHOULD have known better than to mess with the registry!) My bad).

    Thanks a lot for your time in advance, and I look forward to hear from you!  VikeMike4
    

  Erwan,
  You must read this entire thread and the State, if you have tried the steps listed here or that you tried to fix the problem.  Take a look at this article, because it has a solution for 643 errors: KB971187
  Mike - Engineer Support Microsoft Answers
  Visit our Microsoft answers feedback Forum and let us know what you think.

• I can't install the updates of Windows on Vista. Error code is that 80246008-Windows Update encountered an unknown error.

  I can't install the updates of Windows on Vista. Error code is that 80246008-Windows Update encountered an unknown error.  Help had two suggestions being to check to see if the Background Intelligent Transfer Service is running, and I don't have the service installed, it is the problem.  What should I do?

  Hi Nita,

  Thanks for posting your question in the Microsoft Community forums.

  The description of the problem, I see that you are unable to install Windows Update and receive the error code 80246008. I also see that the PIECES is not in services.

  I imagine the inconvenience that you are experiencing. We are here to help and guide you in the right direction.

  The 80246008 error code may occur if the (BITS) Background Intelligent Transfer Service is not started or is configured incorrectly.

  I suggest you try the procedure described in the article and see if it helps.

  Error message when you search for available updates on the Windows Update Web site or on the Microsoft Update Web site: "0 x 80246008.
  http://support.Microsoft.com/kb/956706

  Let us know the status of the issue after you perform the troubleshooting steps. If you need to get assistance or information about this problem with Windows Update, I'll be happy to help you. We, at tender Microsoft to excellence.

• Hi I am trying to install updates, and they will not install an error found Code 643 Windows Update encountered an unknown error

  Help

  Tracey,

  http://support.Microsoft.com/kb/555375

  You can watch the following article to see if this will help with the error 643.

  http://Windows.Microsoft.com/en-us/Windows-Vista/Windows-Update-error-80070643 

  http://support.Microsoft.com/kb/946414

  During the installation of .net Framework updates with Windows update or Microsoft Update you may receive error 80070643 0 x or 0 x 643
  http://support.Microsoft.com/kb/976982>

  If no joy, of the article in the Knowledge Base for ALL the .NET security updates:

  "How to get help and support for this security update

  For home, users visit Microsoft Solution Center and antivirus security for resources and tools to keep your PC safe and healthy.  If you have problems with the installation of the update itself, visit the Microsoft Update Support for resources and tools to keep your PC updated with the latest updates.

  For enterprise customers, support for security updates is available through your usual support contacts. "

  Let us know if this helped.

• Code 643 Windows Update encountered an unknown error

  I continue to encounter this error when you try to update windows.  The steps I have is use selective startup in msconfig to disable all process/services non-windows before running Windows Update and I still received the error.  I checked my update history and don't have any error codes listed.

  There are many updates to install? If so, can you try to install some both (miss those who are updates .NET)

  Indeed, none of them are updates to .NET?

  What is your error? - https://support.microsoft.com/en-gb/kb/976982 , if so, he has a few suggestions.

• Error Code 643 Windows Update encountered an unknown error

  Microsoft .NET Framework 1.1 Service Pack 1
  Publish: 12/05/2009
  I installed this update about 20 times now... Please help me solve this problem. Thank you!!!

  When installing updates using Windows update or Microsoft Update you may receive error 80070643 0 x or 0 x 643 (23 Oct-09)
  http://support.Microsoft.com/kb/976982

• Windows could not search 80072EFE put code up to date, windows update encountered an unknown error

  I tried many times to check updates windows without success and continue to get the same error number and told to try again, but the same answer

  You may encounter temporary connection errors [e.g. 0x80072EFF;] 0x80072EFE; 0x80072efd; 0x80072eef; 0x80072EE2; 0x80072EE7; 0xC80003FA; 0X8024402F; 0x800705B4] when you use Windows Update or Microsoft Update to install updates
  http://support.Microsoft.com/kb/836941

  How to remove malware belonging to the family Rootkit.Win32.TDSS (aka Tidserv, TDSServ, Alureon)
  http://support.Kaspersky.com/viruses/solutions?QID=208280684

• "Code 643 Windows Update encountered an unknown error" (KB973923) & (KB973924) _

  At halfway through the installation, the above error is generated. Tried using Microsoft 'Fix it', without change.

  Whenever I disconnect system tries to install these updates.

  http://support.Microsoft.com/kb/973923/en-us

  Description of the a security update for the Microsoft Visual C++ 2005 Service Pack 1 Redistributable Package (for previously installed versions): July 28, 2009

  http://support.Microsoft.com/kb/973924/en-us

  Description of the a security update for the Microsoft Visual C++ 2008 Redistributable Package (for previously installed versions): July 28, 2009

  The two articles indicate where to get help for these updates

  TaurArian [MVP] 2005-2010 - Update Services

• Error code: 800705B 3 Windows Update encountered an unknown error.

  Hello I have problems with windows update
  I did a Clean Fresh install for Windows Vista Ultimate 64 bit
  and when I tried to run windows update my internet connection got discconected so the update was inturrpted, but when I tried again to run the update I got this message during the installation of updates (error Code: 800705 B 3 Windows Update encountered an unknown error)
  For (Creative - other hardware - Sb Audigy) and I tried to do some steps to solve this problem but nothing
  here what I did

  1 rebooted my computer, checked for new updates, and when I tried to install the update always same error and when I try to click on try again I get the same error message and more

  2. I tried to hide the update and restore it again but still nothing

  3 - I tried the solve the problems of windows help and support, but nothing useful

  Please anyone can solve this problem for me?

  Best regards

  Hello Umesh P

  Thanks for your reply fast I really appreciate it

  I get error when I try to install a driver for Creative sound card update other updates is fine
  but I have corrected the problem before I read your response
  I went to the website creative and downloaded the update drivers manually for the sound card and when I did that the windows update error disappeared 
  After I check (according to the Update Log history) and the update is successful

  Thank you again Umesh P

  Best regards

• Important updates for Vista SP2 Security Installation failure: update MSXML 4.0 SP2 (KB927978) AND (KB954430) security, citing error Code 652, Windows Update encountered an unknown error!

  Has no significant updates for VISTA SP2 security installation: MSXML 4.0 SP2 (KB927978) security AND (KB954430), citing error Code 652, Windows Update encountered an unknown error! How is it Windows Update does not recognize it's own mistakes? I tried several times to install both of these important updates without success. Please help me so that I can install these two updates & get back on the right track. Thank you!

  See the section "How to get help", for example, http://support.microsoft.com/kb/927978

  Visit the Microsoft Solution Center and antivirus security for resources and tools to keep your PC safe and healthy. If you have problems with the installation of the update itself, visit the Microsoft Update Support for resources and tools to keep your PC updated with the latest updates.

  For enterprise customers, support for security updates is available through your usual support contacts.

  ~ Robear Dyer (PA Bear) ~ MS MVP (that is to say, mail, security, Windows & Update Services) since 2002 ~ WARNING: MS MVPs represent or work for Microsoft

• Microsoft Update maintains did not give me the error code "646 windows update encountered an unknown error" __Help__Thanks in advance

  Windows Update continues to not give me an error code "0000646 Windows update encountered an unknown error.

  Hello

  Try this 1st to see if it helps, and it should:

  Description of the Patch registration cleanup tool
  http://support.Microsoft.com/kb/976220/

  ------------------------------------------------------

  If necessary :

  Try this - Panel - Windows Updates - on every update that will not be installed - click on the important updates
  or the update itself - double click a view more information (or click top then discovers on the right)

  Those who will take you to a page where you can download the update.

  Or go here and the KBxxxxxx number to download it.

  Download Center - mount the KBxxxxxx.

  Microsoft Download Center
  http://www.Microsoft.com/downloads/en/default.aspx

  Download - SAVE - go to where you put them - click on - RUN AS ADMIN

  Then you can right click on the update in the updates Windows and HIDE.

  If you get an error Installer install this version:

  Windows install 4.5 Redistributable
  http://www.Microsoft.com/downloads/details.aspx?FamilyId=5A58B56F-60B6-4412-95B9-54D056D6F9F4&displaylang=en

  ----------------------------------------------------

  Then run this:

  How to reset the Windows Update components? -a Mr Fixit
  http://support.Microsoft.com/kb/971058

  Description of the system for Windows Vista, Windows Server 2008, update tool and
  for Windows 7
  http://support.Microsoft.com/kb/947821

  ------------------------------------------------------------
  Because these are all Office updates you might get more information if necessary in the Agency of those groups that
  may have experienced the same problem.

  Office newsgroups
  http://www.Microsoft.com/Office/Community/en-us/FlyoutOverview.mspx

  Microsoft.public.office.misc discussions
  http://www.Microsoft.com/communities/newsgroups/list/en-us/default.aspx?DG=Microsoft.public.Office.misc&cat=en_us_01cb749f-c998-4762-8099-df71793c11c7&lang=en&CR=us

  ------------------------------------------------------------

  If necessary you can incident free get reports however the above should take care of it for you.

  Windows updates - free Incident report

  Go here and click on-> Windows Update fails while searching, downloading or installation of updates
  http://support.Microsoft.com/GP/wusupport#tab3

  The security updates, you can get free support Incident report
  http://www.Microsoft.com/protect/resources/support.aspx

  I hope this helps.
  Rob - bicycle - Mark Twain said it is good.

• Impossible to install KB2686827 and KB2656368, keeps telling me that Windows Update encountered an unknown error. Code 641

  Check and fix the completed transaction. All of the files and registry keys listed in this operation were repaired successfully.  But I'm not able to upgrade windows (KB2686827) and (KB2656368).  Its keep telling me that Windows Update encountered an unknown error. 641, the code Please HELP. I have Windows Vista Home Premium 32 bit. Thanks in advance.

  Original title: of my CBS.log

  Try the manual download for both method:

  Update of security for Microsoft .NET Framework 4

  Update of security for Microsoft .NET Framework 4

• Windows Vista - Error Code: Windows Update encountered an unknown error

  When you use Windows Update on my computer the program informs me that there is an important update for my computer.  After clicking on the "install updates" button
  After that, he says:
  Update 1 of 1
  Microsoft. NET Framework 1.1 Service Pack 1 update for Windows.

  Then he informed me that the updates were not installed and comes up with:

  Update code 643 Windows has encountered an unknown error.

  I tried to manually install Service Pack 2 on the microsoft site as suggested in a convenience store for the errors that occur during updates, but this does not appear to have solved the problem.

  You can provide any assistance would be greatly appreciated.

  Step #1 => foremost, note what version of .NET Framework is installed:

  How to determine what version of the .NET Framework is installed and determine whether the service packs have been applied
  http://msdn.Microsoft.com/en-us/KB/kb00318785.aspx

  Step #2-online now see resolution method 2 in this related KB article: http://support.microsoft.com/kb/923100

  After running the cleaning of .NET Framework (not the Windows Installer Cleanup utility) tool, reinstall all the versions of the .NET Framework (but the ones you noted in #1 above) manually using the download links on the page, and then run Windows Update manually install security updates for same.

  NB: If you remove the .NET Framework 3.5 (SP1) by using the tool, reinstall .NET Framework 3.5 will also install .net Framework 2.0 SP2 and 3.0 SP2. Then, Windows Update will offer .NET Framework 3.5 SP1.

  IMPORTANT! =>, If you remove the .NET Framework 3.5 (SP1), reinstall your version of .NET Framework in the following order:

  1. the .net framework 3.5, then...
  2 .net framework 1.1, then...
  3 .net framework 1.1 SP1

  NB: KB923100 makes reference to this page: http://blogs.msdn.com/astebner/archive/2006/05/30/611355.aspx.  Please read ALL as well as the related http://blogs.msdn.com/astebner/pages/8904493.aspx before using the .NET Framework cleanup tool.

  Step #3 => Check-in at Windows Update and install the critical updates of security offered.

  
  PS: I think you have worse problems, Phil: http://social.answers.microsoft.com/Forums/en-US/vistawu/thread/856d02a2-837c-4e10-ad51-82039bf5c166
  ~ Robear Dyer (PA Bear) ~ MS MVP (that is to say, mail, security, Windows & Update Services) since 2002 ~ WARNING: MS MVPs represent or work for Microsoft

• Windows Update has failed. "Error found: Code 8007001F Windows Update encountered an unknown error." _

  RALink - network - 802.11n/b/g Wireless LAN USB 2.0 Mini adapter 379ko

  Windows Update has failed. "Error found: Code 8007001F Windows Update encountered an unknown error."

  I bought a wifi USB adapter and it is a driver windows 7 available on the manufacturer's website. RALink

  http://eng.ralinktech.com.tw/support.php?s=1

  My computer is a HP P6110f desktop computer. It came with a Vista 64 OS which I've upgraded to a Windows 7 Home Premium.

  I tried to install all kinds of different ways but were not able to make it work.

  Disconnect all other devices driver/software uninstalled and reinstalled all plugging adapter in each computer startup I tried port USB with adapter connected and also connect after windows load discharged from all applications running, including firewall and anti-virus

  Can you please help me solve this problem? I consider myself quite computer but I'm completely puzzled here.

  http://social.answers.Microsoft.com/forums/en-us/category/Windows7
  Windows 7 discussion groups

  They may be able to help in obtaining the wifi USB adapter to work.

  8007001F (a device attached to the system is not functioning) TaurArian [MVP] 2005-2010-implementation to date of Services

• Code 80070641 Windows Update encountered an unknown error.

  Windows Vista Home Prem 32-bit version get Code 80070641 Windows Update encountered an unknown error.  In addition, an update of the Adobe Reader keeps fail with the error #1500.
  Any suggestions?

  Hi JimTT,

  A. you are using windows XP, vista or windows 7?

  B. you are trying to install the automatic updates?

  If you use windows XP or vista, you try to run the microsoft Fixit and try again to install updates. You can open the link below and click the Fixit .

  http://support.Microsoft.com/kb/971058

  You can also check out the thread link which addresses the same issue below. Check the suggestion provided by Jared M.  This can help you with updates of Adobe as well as 1500 error is also related to the windows installer.
  http://social.answers.Microsoft.com/forums/en-us/vistawu/thread/446c108b-3222-46F9-AD2C-05dd231fd071

  You can run windows update Troubleshooting If you run windows 7 on your computer.
  http://Windows.Microsoft.com/en-us/Windows7/open-the-Windows-Update-Troubleshooter

  update failed error 1500...
  http://forums.Adobe.com/thread/614949

  I hope this helps.

  Bindu S - Microsoft Support
  Visit our Microsoft answers feedback Forum and let us know what you think.