Windows XP not updating

Sometimes (after recovery or changes in system when running in Virtual Box) windows will stop updating.

The following procedure will fix that.

Stop the Windows Automatic Updates Service via the command prompt.

net stop wuauserv

Re-Register the WUPS2.DLL file

regsvr32 %windir%\system32\wups2.dll

Restart the Automatic Updates Service

net start wuauserv

Restart the computer and run Windows Updates, they should now download and install properly.