How to Register Windows Update Files After Service Pack 3

1. Click 'Start' and select 'Run.'
2. Type 'cmd' in the 'Run' box. Click 'OK' or press 'Enter' on your keyboard to open the Command Prompt.
3. Type the following line in the Windows Command Prompt box:net stop wuauservPress 'Enter.' Typing this command and pressing 'Enter' stops the Automatic Updates service so that the file can be reregistered.
4. Type the following line in the Windows Command Prompt:regsvr32 %windir%\system32\wups2.dllPress 'Enter.' Pressing 'Enter' after typing this command reregisters the 'Wups2.dll' file. Click 'OK' if a verification message box appears.
5. Type the following line in the Command Prompt box:net start wuauservPress 'Enter' to restart the Windows Automatic Updates service.
6. Type the word 'exit' in the Command Prompt box. Press 'Enter' to close the Command Prompt window.