Vista Update error Code 80070645!!!

Hello,

I'm an average VISTA user and I've got one update left that won't get installed cause of error code 80070645.

what should I do?



Bassam

1.Reset WU components in aggressive mode How do I reset Windows Update components?
2.Reset WU libraries Repair & Fix Windows Updates with Fix WU Utility | The Windows Club


If nothing help answer with which one hotfix do you have trouble.Maybe it is NET Framework 3.5 SP1?