Resolve Windows Update problems on Vista

Some of Windows Update errors on Vista can be solved by resetting the state of the Windows Update service on the machine.  The state is saved in the %SystemRoot%\SoftwareDistribution directory.  So all that needs to be done is deleting the contents of that directory.  When the update service is started next time, it will recreate this directory contents by downloading the data from the online update server.  Just follow these easy steps:

1. Stop the "Windows Update" service.
2. Delete %SystemRoot%\SoftwareDistribution directory.
3. Restart the "Windows Update" service.