First of all, check the WindowsUpdate.log file found in the Windows folder. It should tell you how the update failed. Look for something looking like this: WARNING: Command line install completed. Return code = 0x0000066a, Result = Failed and later on WARNING: Install failed, error = 0x80070643 / 0x0000066A.

If you have the same error, check this article out: Fix KB974417 Installation Failure—Microsoft .NET Framework 2.0 Service Pack 2 Security Update for Windows 2000, Windows Server 2003, and Windows XP.

However, my problem was that I had NOT installed the KB976569 Windows update that the guy recommends removing before installing the new one.

I found this article: KB 953297 and KB974417 Fails to Update Through Windows Update that recommends a clean reinstall of the .NET Framework. Haven't tried it, though. I just didn't do the update. Probably when all hell breaks loose I am going to regret it, but at least I passed the message on :)


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