Službu DCOM by som nevypínal (edit: vlastne možno aj hej). Postupoval by som podľa tohto:
http://www.windowsbbs.com/showthread.php?t=47229

Takže by som spustil tieto príkazy:

net stop wuauserv
regsvr32 /s wuapi.dll
regsvr32 /s wups.dll
regsvr32 /s wups2.dll
regsvr32 /s wuaueng.dll
regsvr32 /s wuaueng1.dll
regsvr32 /s wucltui.dll
regsvr32 /s wuweb.dll
regsvr32 /s jscript.dll
regsvr32 /s atl.dll
regsvr32 /s softpub.dll
regsvr32 /s msxml3.dll
net start wuauserv