microsoft security update

Hello, For more than a month now microsoft has tried to install: Microsoft works 8 N0. kb977304.

It has failed everytime, it tells on the update list it is an important update, has me wondering.

Can anyone give me some advice on this problem.

Thanks in advance

1.Reset the whole WU components in aggressive mode
How do I reset Windows Update components?
2.Diagnose Windows Installer key by using this tool 'Description of the
Patch Registration Cleanup Tool Description of the Patch Registration Cleanup Tool

Thanks