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Windows 7: Win 7 updates failed - 80070643 and 80071A91

26 Sep 2012   #1

7 pro 64
 
 
Win 7 updates failed - 80070643 and 80071A91

Windows Update fails to install any updates, and shows error codes 80070643 and 80071A91.
There are several threads about these errors, and I have read all of them.
I tried the Microsoft fixits 50123 and 50709.
I cleaned out .NET framework, and did cleanup
I tried Dockster's fix here www.sevenforums.com/windows-updates-activation/97775
I tried the "Set autoreset true" fix.

and then, after all that, I finally fixed it with...Checkdisk!

(My computer / local disk C: / right-click / properties / tools / check now / "Yes" to scheduled check)

I hope that by putting this all in one place, I can save someone a bit of trouble.

My System SpecsSystem Spec
26 Sep 2012   #2

Microsoft Community Contributor Award Recipient

Win 7 x64 Home Premium (and x86 VirtualBox VM)
 
 


You should probably also run an SFC to be on the safe side - in an Elevated Command Prompt window, type
SFC /SCANNOW
and go and have a beer to
My System SpecsSystem Spec
26 Sep 2012   #3

7 pro 64
 
 

yep, tried that one too.
Two days of messing about with elevated command prompts before I thought to try the simple stuff!
My System SpecsSystem Spec
.


26 Sep 2012   #4

Microsoft Community Contributor Award Recipient

Win 7 x64 Home Premium (and x86 VirtualBox VM)
 
 

My first reaction is almost always CHKDSK followed by SFC - then go for the nasty stuff
My System SpecsSystem Spec
22 Sep 2013   #5

Windows 7 Home Premium 64 bit
 
 

I know this is an old post but THANK YOU!!! I had the two exact same errors and Check Disk fixed it perfectly. I spent a lot of time trying to figure this one out and finally stumbled upon this post.
My System SpecsSystem Spec
17 Nov 2013   #6

Win7 Home 64 bit
 
 

Checkdisk worked for me too!

(Windows update error 80071A91 also 80070643)
My System SpecsSystem Spec
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 Win 7 updates failed - 80070643 and 80071A91





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