Hi,
Do you remember which Windows Updates you were trying to install?
I would suggest you to refer to this article and perform the troubleshooting.
http://support.microsoft.com/kb/949358/en-us
Clean Boot: After troubleshooting in a Clean Boot state, make sure to place the computer back to Normal Startup Mode following the same link.
Let us know if it helps. If the issue persists, please reply, we will be glad to assist you further.
