I downloaded an update from ms and upon restart it said I could not be authenticated.
Error code: 0x80004005

I can open my computer (ACER) in safe mode but not much happens.

FYI I am on my laptop now.

maybe in safe mode you could go to the control panel/add and remove programs ans see if you can uninstall the update
or if you are so inclined you could try MS's suggestion .
http://support.microsoft.com/kb/914232

maybe in safe mode you could go to the control panel/add and remove programs ans see if you can uninstall the update
or if you are so inclined you could try MS's suggestion .
http://support.microsoft.com/kb/914232

Thanks, I'll give it a try.

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