Windows Update error codes 80070643 and 80071A91.

OK - run these commands and post the results...

DIR %Windir%\System32\SMI\Store\Machine
DIR %Windir%\System32\SMI\Store\Machine /S


Here are some instructions to make lifeeasier :)

1) To open anElevated Command Prompt Window (the ECP window), click on Start, All Programs,Accessories – then right-click on Command Prompt, and select Run asAdministrator. Accept the UAC prompt.

2) To run thecommands easier, highlight the block of commands, and right-click on thehighlight – select Copy. In the CP Window, click on the black/white icon at topleft – select Paste. The commands will run but may not complete the lastcommand, so hit the Enter Key once.

3) To copy theresults... click on the Black/White icon in the top left, and select Edit...'Select All', and hit the Enter key - then use Ctrl+V or r-click+Paste to pasteit into your response.

That still looks normal to me -they're about the right size, and the right date.
I need to review the thread, so I'll get back to you when I come up with a way forward.

You have over a year to do that - I haven't forgotten you!