Posted 21 June 2011 - 09:44 AM
It could be that the Windows Updates didn't install correctly.
Don't restart the computer, go to Start, click on run, and type services.msc, then click ok.
In th list, highlight Automatic Updates and click Stop the service. Minimize the services window.
Open My Computer, and go to C:\WINDOWS. Find the Software Distribution folder and delete it.
Bring the Services Window back up and click Start the service.
Reboot the PC, allow the updates to redownload/reinstall and see if that resolves the issue.