Windows 7 - SP1 installation problems

I have various pcs/laptops and sp1 has installed fine on all but one.

It's an acer aspire desktop and I havent seen behaviour like this before - I was wondering if anyone can point me in the right direction.

On windows update it failes to configure right at the death (99%) - but worse than that it fails to revert properly leaving me with a system where all the programs won't launch (via desktop shortcuts or via explorer) - useless in effect - the only way to get the system back is via system restore from safe mode.

I did get it to install from the full SP1 download but the system on completion was exactly as described above and system restore was required again.

Struggling to work out what could be causing the conflict. I uninstalled nod32 prior to install to see if that helped but it didn't. The pc is approx 6 months old and has been perfect until now. It's 64 bit, 4gb ram, nvidia grahics card - really struggling to work out whats happening.

cheers for any help

Reset WU
Windows Update - Reset

Thanks for moving

aplogies for posting in the wrong section

Have you read this?

Steps to follow before you install Windows 7 Service Pack 1 from the Microsoft Download Center

Thanks for your reply

Im not using an integrated graphics device

I have the update mentioned and I certainly have no malware

As I said everything has been perfect till this. It's almost as if SP1 completely breaks windows.

on checking the update history in installed updates Im getting this error code

80070005

Did you reset WU as mentioned in post #2?

I had missed that post - Ive done that now

I will re-try and sp1 update and report back

thanks for the help

well unfortunately that didn't solve the problem.

The only thing different I noticed was that the install got to 100% this time on the reboot before deciding that it had failed and was reversing changes.

However, as before, sp1 doesn't uninstall properly at all, breaks windows on reboot requiring a system restore from safe mode to get the workable system back

very confused.

Im guessing this must be some kind of driver conflict somewhere but ive no idea what

Hello Gunneradt

I have the same problem as you have with the windows 7 service pack 1 update.
Tried everything, but nothing works.

Greetings, and when I find outsomething more I wil post it here!