Windows XP cannot install Windows Updates After a Repair Install

Microsoft has confirmed a problem of Windows XP not installing Windows Updates after performing a repair install of Windows XP according to this blog post from the Microsoft Update Product Team Blog.

When performing a repair install, all Windows XP system files are replaced with the files on the Windows XP CD including the Windows Update files. Windows system registry settings are restored as well. During the repair operation, the Wups2.dll is not deleted or replaced because this file is not known to Windows XP repair process but the registry entries for the Wups2.dll are deleted which causes the Windows Update failures. KB943144 has more information about this problem.


  1. Log in with Administrative privileges.
  2. Click Start and then Run.
  3. Type cmd in the Run dialog box to open the Command Prompt.
  4. Press ENTER on your keyboard.
  5. Type the following to stop the Automatic Update service:

    net stop wuauserv

  6. Press ENTER on your keyboard.
  7. Type the following the register the Wups2.dll file:

    regsvr32 %windir%\system32\wups2.dll

  8. Press ENTER on your keyboard.
  9. Type the following to start the Automatic Update service:

    net start wuauserv

  10. Press ENTER on your keyboard.
  11. Type the following to close the Command Prompt.


  12. Press ENTER on your keyboard.
  13. Visit Windows Update to keep you computer secure with known vulnerabilities.

Platforms Tested

  • Microsoft Windows XP 32-bit Editions

Important Reminder

Please keep your computer up to date with Critical and Important updates by visiting Microsoft Update. If you experience any problems with Microsoft Security updates then please call Microsoft support for help. There will be no charge for support on Security Updates.

Microsoft has set up newsgroups for self-support. If you need help for Security updates or any other updates that is issued by Microsoft then please visit the Windows Update newsgroup at using your newsreader news://

Version 1.1
Edited: May 11, 2012


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