Reset Windows Update

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FOR WINDOWS 7

  1. Open a Windows Command Prompt Windows. To open a command prompt, click Start and then click Run. Copy and paste (or type) the following command in the Open box and then press ENTER:

    cmd
  2. Stop the BITS service and the Windows Update service. To do this, type the following commands at a command prompt. Press ENTER after you type each command.
    • net stop bits
    • net stop wuauserv
  3. Delete the qmgr*.dat files. To do this, type the following command at a command prompt, and then press ENTER:
    Del "%ALLUSERSPROFILE%\Application Data\Microsoft\Network\Downloader\qmgr*.dat"
  4. Steps in step 4 are also performed by the "Aggressive" mode of the Fix it Solution above:
    1. Rename the following folders to *.BAK:
      • %systemroot%\SoftwareDistribution\DataStore
      • %systemroot%\SoftwareDistribution\Download
      • %systemroot%\system32\catroot2
      To do this, type the following commands at a command prompt. Press ENTER after you type each command.
      • Ren %systemroot%\SoftwareDistribution\DataStore *.bak
      • Ren %systemroot%\SoftwareDistribution\Download *.bak
      • Ren %systemroot%\system32\catroot2 *.bak
    2. Reset the BITS service and the Windows Update service to the default security descriptor. To do this, type the following commands at a command prompt. Press ENTER after you type each command.
      • sc.exe sdset bits D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)
      • sc.exe sdset wuauserv D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)
  5. Type the following command at a command prompt, and then press ENTER:
    cd /d %windir%\system32
  6. Reregister the BITS files and the Windows Update files. To do this, type the following commands at a command prompt. Press ENTER after you type each command. (certain files may not be found, that is okay)
    • regsvr32.exe atl.dll
    • regsvr32.exe urlmon.dll
    • regsvr32.exe mshtml.dll
    • regsvr32.exe shdocvw.dll
    • regsvr32.exe browseui.dll
    • regsvr32.exe jscript.dll
    • regsvr32.exe vbscript.dll
    • regsvr32.exe scrrun.dll
    • regsvr32.exe msxml.dll
    • regsvr32.exe msxml3.dll
    • regsvr32.exe msxml6.dll
    • regsvr32.exe actxprxy.dll
    • regsvr32.exe softpub.dll
    • regsvr32.exe wintrust.dll
    • regsvr32.exe dssenh.dll
    • regsvr32.exe rsaenh.dll
    • regsvr32.exe gpkcsp.dll
    • regsvr32.exe sccbase.dll
    • regsvr32.exe slbcsp.dll
    • regsvr32.exe cryptdlg.dll
    • regsvr32.exe oleaut32.dll
    • regsvr32.exe ole32.dll
    • regsvr32.exe shell32.dll
    • regsvr32.exe initpki.dll
    • regsvr32.exe wuapi.dll
    • regsvr32.exe wuaueng.dll
    • regsvr32.exe wuaueng1.dll
    • regsvr32.exe wucltui.dll
    • regsvr32.exe wups.dll
    • regsvr32.exe wups2.dll
    • regsvr32.exe wuweb.dll
    • regsvr32.exe qmgr.dll
    • regsvr32.exe qmgrprxy.dll
    • regsvr32.exe wucltux.dll
    • regsvr32.exe muweb.dll
    • regsvr32.exe wuwebv.dll
  7. Reset Winsock. To do this, type the following command at a command prompt, and then press ENTER:
    netsh reset winsock
  8. If you are running Windows XP or Windows Server 2003, you have to set the proxy settings. To do this, type the following command at a command prompt, and then press ENTER:
    proxycfg.exe -d
  9. Restart the BITS service and the Windows Update service. To do this, type the following commands at a command prompt. Press ENTER after you type each command.
    • net start bits
    • net start wuauserv
  10. If you are running Windows Vista or Windows Server 2008, clear the BITS queue. To do this, type the following command at a command prompt, and then press ENTER:
    bitsadmin.exe /reset /allusers
  11. Install the latest Windows Update Agent. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
    949104 How to obtain the latest version of the Windows Update Agent to help manage updates on a computer
  12. Restart the computer.
by: http://support.microsoft.com/kb/971058
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