Suddenly Windows 7 has stopped installing Windows Updates. It downloads, then creates restore point, starts installation, but then comes back with the error code 800F0900. This happens with all the updates when carried out individually, critical or optional. I first went through the process of clearing all the Start-up Programs in the Services section of msconfig. As that did not solve it I then stopped all but MS services, and that did not solve it. I tried the Microsoft .NET Setup Verification Tool. This said there were problems that it could not fix and sent a report to Microsoft. Following an earlier thread on this site, I installed and used the Windows Repair program from Tweeking.com. This failed to solve the problem. Does any one have any other possible advice to help solve this problem ?