Avoid re-installing the same Windows Updates

If you seem to be downloading the same Windows Update over and over, or repeatedly getting notifications from the Windows Update site, then the Updates were not installed correctly on the system. This can be cause by a variety of reasons, like if the trust database for the machine has become corrupted and must be recreated.To do this just rename the CatRoot2 folder to CR2OLD. The CatRoot2 folder can be found in the system32 folder.
Click on Start>My Computer>C drive>WINDOWS>System32

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