I had no luck on finding which update causes 100% CPU Usage, they all relate to svchost. Well atleast thats what I found.
The sites I used were,
Microsoft Update causes 100 percent cpu usage. - DriverHeaven.net Microsoft update causes 100% cpu usage - MSFN Forums
and
High CPU Usage (couldnt find anything that related to my problem)
Does anybody have any other suggestions =[?