Q: Windows Update Error Code 663 (kb951847)x86 fails to install This thread is locked from future replies

I have tried to run windows update for .net framework 3.5 SP1 (kb951847)x86 but it fails with error code 663. I have ran multiple updates with out failure, but now there are 2 that fail to load. the other one is .net framework 1.1 SP1 KB953297 x86 that that error code is 643.

I have rebooted between each attempt and after 3 attempts and reboots, I have no idea how to resolve this issue. Knowledge base searches have revealed no answer, however I am sure this has been resolved, and I probably just have not used the correct criteria search.

Help please.



When you try to install an update for the .NET Framework 1.0, 1.1, 2.0, 3.0, or 3.5, you may receive Windows Update error code "0x643" or Windows Installer error code "1603"

Windows Update Forum:


This is the Vista Install, Upgrade and Activate Forum.

You will get the best help for any Update/Service Pack problem in the Windows Update Forum; link below:

When you repost there, kindly include any Error Codes, and exactly what happens when you attempt to Update.

That way you will receive the best help there.


Mick Murphy - Microsoft Partner

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Views: 10,663 Last updated: January 17, 2018 Applies to: