Login screen - DNS issue

We seem to be affected by intermittent empty login screen on my company's website, but only for the microsoft login page, the login page Skype charges well.

Loading Skype upward, you get this screen:

And users choose 'Microsoft account '. They should then see this screen:

Instead they get this:

Inside, there is a warning message stating the following:

"This page contains errors. Go back'

The site uses OpenDNS to filter queries DNS for computers and politics is quite locked.

On any affected PC, if:

-Close Skype

-Run the DNS settings to something like 8.8.8.8 (google DNS server)

-Load Skype

The login screen (image 2) loads normally. The user can connect and I can then folding the DNS settings on the OpenDNS server and there is no other problem.

Which means that Skype is trying to communicate with a Microsoft/Skype server somewhere on the interent and because it is not on my whitelist OpenDNS it gets blocked and it fails as in Fig. 3.

My question can someone tell me what is the server? I went through the OpenDNS logs and the white list a bunch of stuff from microsoft and other things related to the certificates, but still no luck.

Evetually I took the suggestion of Techfreak and sniffed packets with wireshark. Was annoyed to discover that the root cause of the problem is strangely named sb.symcd.com.

Some quick Google-fu led me to a page that said that this area should be on a whitelist for Lync facilities. Hmm.

Why microsoft couldn't use Server intuitive/descriptive names more is a mystery. In any case, I have whitelisted *. symcd.com and of the limited testing it seems to be resolved.

Tags: Skype

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    Rob Brown - Microsoft MVP<- profile="" -="" windows="" expert="" -="" consumer="" :="" bicycle=""><- mark="" twain="" said="" it="">

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    Incompatible system files can also cause this error. This can happen if you restored your hard disk from a backup. Some backup programs may skip restoring system files which they determine are in use.

    Solve the problem

    Run the kernel debugger is not useful in this situation because the error occurred in a user mode process.

    Resolve an error in the user-mode device driver or system, third-party application service: Because the bug 0xC000021A control occurs in a user mode process, the most common culprits are third-party applications. If the error occurred after the installation of the new or updated device driver or service system, third-party applications, the new software should be removed or disabled. Contact the manufacturer of the software on a possible update.

    If the error occurs during the system startup, restart your computer, and then press F8 to character-based menu that displays the choice of operating system. In the Windows Advanced Options menu that results, select the last known good Configuration option. This option is most effective when a pilot or a service is added at a time. If the error is not resolved, try to manually remove the offending software. If the system partition is formatted with the (FAT) file allocation table, use a MS-DOS boot disk to access the hard disk of the computer. If the system partition is formatted with the NTFS file system, you may be able to use Safe Mode to rename or remove the defective software. If the defective software is used as part of the start-up procedure of the system Safe Mode, you must start the computer by using the Recovery Console to access the file. If a room newly installed if material is suspected, remove it to see if that fixes the problem.

    Try running the emergency recovery disk (ERD) and allow the system to repair any errors that it detects.

    Solve a problem of file system do not match: If you have recently restored your hard disk from a backup, check if there is an updated version of the backup/restore program available from the manufacturer. Make sure that the latest Windows Service Pack is installed.

    STOP: 0XC000021A<-- read="" this="">
    * 1314.html http://www.faultwire.com/solutions-fatal_error/Status-System-Process-terminated-0xC000021A-

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

    Look in the Event Viewer to see if something is reported on those.
    http://www.computerperformance.co.UK/Vista/vista_event_viewer.htm

    MyEventViewer - free - a simple alternative in the standard Windows Event Viewer.
    TIP - Options - Advanced filter allows you to see a period of time instead of the entire file.
    http://www.NirSoft.NET/utils/my_event_viewer.html

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

    It's my generic bluescreen convenience store - you can try Mode safe mode as suggested in article
    above - repeatedly press F8 that you start. Disks of Vista are probably necessary - if you do not try to repair it, you can borrow a friends because they are not protected against copying. You can also buy the physical disks
    good system machine cheap that you already own Windows (you have to reinstall them if)
    required). You can also repair disks on another computer.

    Here are a few ways to possibly fix the blue screen issue. If you could give the blue screen
    info that would help. Such as ITC and 4 others entered at the bottom left. And all others
    error information such as codes of STOP and info like IRQL_NOT_LESS_OR_EQUAL or PAGE_FAULT_IN_NONPAGED_AREA and similar messages.

    As examples:

    BCCode: 116
    BCP1: 87BC9510
    BCP2: 8C013D80
    BCP3: 00000000
    BCP4: 00000002

    or in this format:

    Stop: 0 x 00000000 (oxoooooooo oxoooooooo oxoooooooo oxooooooooo)
    Tcpip.sys - address blocking 0 x 0 00000000 000000000 DateStamp 0 x 000000000

    It is an excellent tool for displaying the blue screen error information

    BlueScreenView scans all your minidump files created during "blue screen of death," collisions
    Displays information on all the "crash" of a table - free
    http://www.NirSoft.NET/utils/blue_screen_view.html

    BlueScreens many are caused by old or damaged, in particular the video drivers drivers however
    There are other causes.

    You can do mode if necessary safe or the Vista DVD command prompt or
    Options recovery if your system is installed by the manufacturer.

    How to start on the System Recovery Options in Windows 7
    http://www.SevenForums.com/tutorials/668-system-recovery-options.html

    You can try a system restore to a point before the problem started when one exists.

    How to do a system restore in Windows 7
    http://www.SevenForums.com/tutorials/700-system-restore.html

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

    Start - type this in the search box-> find COMMAND at the top and RIGHT CLICK – RUN AS ADMIN

    Enter this at the command prompt - sfc/scannow

    How to fix the system files of Windows 7 with the System File Checker
    http://www.SevenForums.com/tutorials/1538-SFC-SCANNOW-Command-System-File-Checker.html

    How to analyze the log file entries that the Microsoft Windows Resource Checker (SFC.exe) program
    generates cbs.log Windows Vista (and Windows 7)
    http://support.Microsoft.com/kb/928228

    The log can give you the answer if there is a corrupted driver. (Says not all possible
    driver problems).

    Also run CheckDisk, so we cannot exclude as much as possible of the corruption.

    How to run the check disk at startup in Windows 7
    http://www.SevenForums.com/tutorials/433-disk-check.html

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

    Often drivers up-to-date will help, usually video, sound, network card (NIC), WiFi, part 3
    keyboard and mouse, as well as of other major device drivers.

    Look at the sites of the manufacturer for drivers - and the manufacturer of the device manually.
    http://pcsupport.about.com/od/driverssupport/HT/driverdlmfgr.htm

    Installation and update of drivers under Windows 7 (updated drivers manually using the methods above
    It is preferable to ensure that the latest drivers from the manufacturer of system and device manufacturers are located)
    http://www.SevenForums.com/tutorials/43216-installing-updating-drivers-7-a.html

    How to disable automatic driver Installation in Windows Vista - drivers
    http://www.AddictiveTips.com/Windows-Tips/how-to-disable-automatic-driver-installation-in-Windows-Vista/
    http://TechNet.Microsoft.com/en-us/library/cc730606 (WS.10) .aspx

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

    How to fix BlueScreen (STOP) errors that cause Windows Vista to shut down or restart
    quit unexpectedly
    http://support.Microsoft.com/kb/958233

    Troubleshooting Vista Blue Screen, error of JUDGMENT (and Windows 7)
    http://www.chicagotech.NET/Vista/vistabluescreen.htm

    Understanding and decoding BSOD (blue screen of death) Messages
    http://www.Taranfx.com/blog/?p=692

    Windows - troubleshooting blue screen errors
    http://KB.wisc.edu/page.php?id=7033

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

    In some cases, it may be necessary.

    Startup Options recovery or Windows 7 disk repair

    How to run a startup repair in Windows 7
    http://www.SevenForums.com/tutorials/681-startup-repair.html

    How to start on the System Recovery Options in Windows 7
    http://www.SevenForums.com/tutorials/668-system-recovery-options.html

    How to create a Windows 7 system repair disc
    http://www.SevenForums.com/tutorials/2083-system-repair-disc-create.html

    I hope this helps.

    Rob Brown - MS MVP - Windows Desktop Experience: Bike - Mark Twain said it right.

  • Black screen with cursor, no login screen; Windows 7 Home Premium 32-bit

    Hi all

    I have a Dell Inspiron 1501 running Win7 Home Premium 32 - bit with IE9. It worked perfectly fine for over a year. The last update listed in the system restore was on 23/04/2011. He installed the Windows updates.

    My husband used the computer very well the next morning. When I tried to start the computer, it wouldn't so I thought that maybe the battery should be charged. I plugged it in and nothing helped. The load button wouldn't even nothing worked at all. I bought a new battery and it came yesterday. I changed the batteries and let one over new-completely. I then tried to start the computer and he did something I could not do in months... He ran the disk check.

    The disk check lasted almost 2 hours. He wouldn't let me cancel it either. He said (from the pieces that I could see) that system files have been moved, a ton of them said that they have been replaced, others have been removed, and some have been updated. I knew not what do when it restarted because it did it is normal startup, showed at the Windows startup screen and then when I thought he was going to the login screen, it became black and only the cursor has been visible and moving.

    I restarted again and this time the display of incorrect closing came. I tried all the options - normal mode, safe mode safe mode w/networking and safe mode w/prompt - all results were the same. Then I tried using the recovery tool to fix the problem. Startup Repair showed no problem, System Restore showed either deleted or corrupted files and I ran Windows Memory Diagnostic and it showed no problems. I even ran the Diagnostic tool in the start menu.

    I think that chkdsk deleted my files of Windows, but I don't know how to get back them. I have the OS disk and tried to use the repair feature, but nothing yet. Also, I had to ask my husband did it to my laptop and he answered nothing. So I had to be more specific, and his answer to my questions were: ' I didn't download anything "and" I just closed the laptop, I never disconnected or shut it down. I guess that's the reason for the battery works not properly the next day.

    If someone could help me with this, I would be very grateful.

    Hello

    Why my screen is black when I start Windows 7?
    http://Windows.Microsoft.com/en-us/Windows7/why-is-my-screen-black-when-i-start-Windows-7

    References to Vista also apply to Windows 7.

    No registration necessary data and re - install Windows 7 might be the best
    the option but here are some others.

    You can save your files by putting the drive in another computer or a
    drive enclosure external hard and then save the. Do this using several
    methods to redundantly. Of course a real computer store or
    the manufacturer of your system can help to recover the files.

    Or you can use a boot Ubuntu CD to back up data.

    Use Ubuntu Live CD to backup files from your Windows computer dead
    http://www.howtogeek.com/HOWTO/Windows-Vista/use-Ubuntu-Live-CD-to-backup-files-from-your-dead-Windows-computer

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

    You can access Mode safe? Repeatedly press F8 as you start? If yes you can try Control Panel - Device Manager - Display Adapter - Double
    Click on - driver tab - click on UPDATE driver - then right-click on
    Devices and UNINSTALL - REBOOT.

    A method to try to get to the desktop (try in two regular windows
    and Safe Mode) is to CTRL + ALT + DEL - Manager tasks and the
    Processes tab find EXPLORER.exe and END PROCESS on it-
    then on the Applications tab - lower right kind - new task - in
    EXPLORER.exe. Safe Mode is available by pressing F8 repeatedly
    you the trunk upwards. CTRL + SHIFT + ESC also begins the Task Manager.

    First check this thread in case it is simple and if not come back
    on this subject.

    http://social.answers.Microsoft.com/forums/en-us/vistaprograms/thread/50247d5e-0ae0-446c-A1bd-11287fd1478a

    Screen black issues are extremely difficult to repair and to any fix is
    usually on a hit or miss basis. There is no information on a black background
    screen as it is on a blue screen just adds to the difficulty. Often
    using a restore point or Startup Repair will have no effect.

    You can try a google to see the proposed repairs, some of which have
    works however these cover a wide field of efforts.

    Here's a video of one of them.

    http://www.Google.com/search?hl=en&q=black+screen+of+death+Vista&btnG=search&AQ=f&OQ=&AQI=G1

    Here's another fix
    http://blogs.PCMag.com/SecurityWatch/2008/12/the_mysterious_black_screen_of.php

    You have a window 7 disk? You can try restoring the system to it.
    If you don't have the disks from your system manufacturer will sell them at low prices.
    Or try in safe mode if you can get there.

    How to do a system restore in Windows 7
    http://www.SevenForums.com/tutorials/700-system-restore.html

    You can create a recovery disc or someone else use same version
    (restoring the system only to be bootable).

    How to create a Windows 7 system repair disc
    http://www.SevenForums.com/tutorials/2083-system-repair-disc-create.html

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

    These require good Windows 7 drives (especially if you can't
    boot mode safe).

    Try the Startup Repair tool-

    What are the system recovery options in Windows 7?
    http://Windows.Microsoft.com/en-us/Windows7/what-are-the-system-recovery-options-in-Windows-7

    How to start on the System Recovery Options in Windows 7
    http://www.SevenForums.com/tutorials/668-system-recovery-options.html

    Try Repair Options recovery or a Windows 7 boot disk system

    How to run a startup repair in Windows 7
    http://www.SevenForums.com/tutorials/681-startup-repair.html

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

    Here are a few Google searches where many have found different solutions:

    'Windows 7' black screen - check that a 1st
    http://www.google.com/search?hl=en&source=hp&q=vista+black+screen&aq=f&oq=&aqi=g10#hl=en&sclient=psy-ab&q=%22Windows+7%22+black+screen&oq=%22Windows+7%22+black+screen&gs_l=serp.3..0l2j0i7j0.11061.20608.0.21138.19.13.1.0.0.4.874.5490.2-2j4j5j1j1.13.0.les%3B..0.0...1c.1.5fPLvNo9C0U&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=4624fb5637e33ac3&bpcl=35466521&biw=1024&bih=731

    Black screen solution "Windows 7".
    http://www.google.com/search?hl=en&q=vista+black+screen+solution&aq=f&oq=&aqi#hl=en&sclient=psy-ab&q=%22Windows+7%22+black+screen+solution&oq=%22Windows+7%22+black+screen+solution&gs_l=serp.3..0j0i8i30l3.83803.88983.0.89342.18.9.2.0.0.4.1950.6210.0j1j1j2j2j7-2j1.9.0.les%3B..1.0...1c.1.DJgtecu85jA&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=4624fb5637e33ac3&bpcl=35466521&biw=1024&bih=731

    Fix black screen "Windows 7".
    http://www.google.com/search?hl=en&q=vista+black+screen+fix&aq=f&oq=&aqi#hl=en&sclient=psy-ab&q=%22Windows+7%22+black+screen+fix&oq=%22Windows+7%22+black+screen+fix&gs_l=serp.12..0j0i7l3.112960.116439.0.118669.13.5.1.0.0.3.1809.5242.2-1j5-1j0j2j1.5.0.les%3B..0.0...1c.1.K18bh3X267U&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=4624fb5637e33ac3&bpcl=35466521&biw=1024&bih=731

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

    If necessary and you can access all ordinary Windows.

    If nothing works, you can do a repair installation.

    How to start on the System Recovery Options in Windows 7
    http://www.SevenForums.com/tutorials/668-system-recovery-options.html

    How to do a repair installation to repair Windows 7
    http://www.SevenForums.com/tutorials/3413-repair-install.html

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

    Another method that works sometimes: at the command prompt, to
    a type of Windows 7 boot disk: (type a line or copy and paste a line)
    at the time and hit enter - enter a parenthesis or "BOLD")

    c:

    cd\

    CD c:\Windows\System32\winevt (there is a space between cd and C :)

    Ren LogsOLD Logs (there are spaces between ren and newspapers and Logsold)

    RESTART Windows

    =================================================================

    These help in some cases:

    There are backups in the folder C:\Windows\System32\Config\Regback.

    These methods replace the registry with a backup.

    Start with a Windows 7 disc. Both the complete following restoration
    a backup of the registry.

    How do I recover from a corrupted registry that prevents Windows XP
    startup ( Vista and Windows 7 also using the instructions in the manual)
    http://support.Microsoft.com/kb/307545/

    Check this thread - you can use the command to a startup or recovery disk prompt.
    (It's Vista and Windows 7 is the same)

    http://social.technet.Microsoft.com/forums/en-us/itprovistasetup/thread/55f98088-0fc3-4371-A005-d95a457d9de6

    ========================================

    How to start on the System Recovery Options in Windows 7
    http://www.SevenForums.com/tutorials/668-system-recovery-options.html

    What are the system recovery options in Windows 7?
    http://Windows.Microsoft.com/en-us/Windows7/what-are-the-system-recovery-options-in-Windows-7

    If you need to repair disks - these help repair Windows not re-install.
    Often these records will help when the OEM recovery disk does not work.

    Download Windows 7 system recovery discs - charge now $9.75 for ISO
    images to make the discs. (It can be done on any computer running XP,
    Vista or Windows 7 which has a CD/DVD burner).
    http://NeoSmart.net/blog/2009/Windows-7-system-repair-discs/

    How create a Windows 7 system - free repair disc (must be made on a
    Windows 7 computer running the same 32-bit or 64-bit).
    http://www.SevenForums.com/tutorials/2083-system-repair-disc-create.html

    An installation disc is possible also to use for repair. Of course you would
    Use your own COST (product key).

    How to: What are my options for Windows 7 reinstall media?

    http://answers.Microsoft.com/en-us/Windows/wiki/Windows_7-system/how-to-what-are-my-options-for-obtaining-Windows-7/528163c1-0b2e-4AD2-a26d-7112851d1dc2

    See MVP Andre Da Costa message in this thread.

    http://answers.Microsoft.com/en-us/Windows/Forum/Windows_7-windows_install/how-can-i-download-gatewaywindows7recovery-disc/3c0ecd74-CFC1-4188-89c7-a6bbe8113ee1

    I hope this helps.
    --------------------------------------------------------------------------------------------
    Rob Brown - Microsoft MVP<- profile="" -="" windows="" and="" devices="" for="" it :="" bicycle="" -="" mark="" twain="" said="" it="">

  • login screen is not happen when I wake the computer

    Hello.  When I got the computer to wake from sleep or sleep, the computer brings me straight to the Windows session without asking for a login.  There is no quick login screen.  Any ideas on why that is?  I put my plan options to be able to ask for a password on wake up in the control panel already.

    Hello

    Welcome to the community of Microsoft and thanks for posting the question. I've surely you will help find a solution on the issue.

    I suggest you to read this article for more information

    Missing in wake of his sleep - login screen requires hard stop
    http://social.technet.Microsoft.com/forums/et-EE/w7itprogeneral/thread/b6387572-7b71-49a6-91c3-056099e724ed

    Hope this information helps. Please reply back with the State so that we can help you.

  • Keyboard not working on Lenovo Windows laptop and stuck on the login screen

    I have a Lenovo WIndows 8 20157 laptop, the keyboard no longer works someday so I restored it.  At that time, I could use an external keyboard.  When the system rebooted, it got to the login screen and will not work.  The screen keyboard and the external keyboard does not work.  The only thing that happens when I use a keyboard (external to the screen, laptop), is that if I hit the button S power options developed.  I can not connect and I can't run it in safe mode.  Already, I have removed the battery and held down the power button, which has not changed anything.

    I took it for someone who told me to restore to factory settings and there are drop down menu in the corner of the login screen, but sometimes the mouse works and sometimes it isn't.  For example at the moment I can't open easy access menu to open the keyboard screen, but sometimes I can't.  Any ideas?

    Hi Jennifer,.

    Welcome to the Microsoft community.

    According to the request, you have problems with the keyboard on your Lenovo laptop.

    As you have made a number of steps to address this issue including restoration to factory settings, I feel that this could be a hardware problem, so at this point in time that it would be better you contact Lenovo for additional troubleshooting support.

    See the link below for contact Lenovo support.

    http://support.Lenovo.com/us/en/contactus

    I hope this information helps, please get back to us for further support on Windows. We will be happy to help you.

    Thank you.

  • Automatically to sleep at the login screen

    If I close my laptop lid, then unplug the power cord, the laptop wakes up to the password login screen.

    How we prevent that? Are there programs that can prevent this or make the portable sleep early ex. 5 min. at the usual time.

    I searched on google and other things for an hour and couldn't find an answer.

    Hello Flamer,

    Thank you for reaching out to us on Microsoft Community.

    Before I can give you suggestions, I gather the following information from you:

    • What is the number and the model of your laptop?
    • All the steps you tried to solve this problem?
    • Where any significant changes made to your computer before this problem?

    According to the description of the issue, I suggest you to perform the steps below.

    • Press on the key Windows + X.
    • Select (Administrator) command prompt in the list of options.
    • At the command prompt, type the following command and press on entry:

    powercfg /RestoreDefaultPolicies

    Search for now, if it can help solve the problem.

    Come back and let us know the State of the question, we will be happy to help you. We, at tender Microsoft to excellence.

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