Did you tried to reset Windows Update service?
I mean do you tried to remove following folders:
%WINDIR%\SoftwareDistribution\Download
%WINDIR%\SoftwareDistribution\EventCache
%WINDIR%\SoftwareDistribution\PostRebootEvenCache
%WINDIR%\SoftwareDistribution\SelfUpdate
%WINDIR%\SoftwareDistribution\DataStore
If you didn't tried it don't do it, because i'm not sure it was exactly that
folders to delete to reset Windows Update... if anyone can make me sure then
i'll be happy...
Offcourse before trying to delete these folder please first run "net stop
wuauserv".
If that helps then i'll be happy..
Please note that you use it at your own risk, because i cannot guarantee it
works since i'm not sure.