Download System Update Readiness Tool for Windows 7 (KB947821)

Looks a useful tool in case you are having problems with Windows Update

This tool is being offered because an inconsistency was found in the Windows servicing store which may prevent the successful installation of future updates, service packs, and software.”

System Update Readiness Tool for Windows 7

and 64bit version at- System Update Readiness Tool for Windows 7 for x64-based Systems

If you are having more issue with Windows Update try the Windows Update Support Centre

Rob

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