Windows 7: Windows Anytime Upgrade Failure; Starter to Home Premium (32 bit)

So I recently bought a product key for Windows Anytime Upgrade, so I can get rid of Windows 7 Starter on my netbook and get Windows 7 Home Premium. I start the Anytime Upgrade software and it works great, but fails as the upgrade gets around 90%, at which the upgrade process "fails" and restores the OS to Windows 7 Starter. I've looked at a few guides that gave solutions, but I've had no luck. Anyone have any ideas on how I can get this working?

The only thing I can find in the upgrade log that looks suspicious is:

Error: WAU | Failed to create WAU event due to error 0x5

Anyone have any ideas on how I can get this to work? Thanks.

(I will give more infos if needed)

Try rebooting to run it again to see if it corrects itself.

Next try a clean boot: In msconfig>Startup uncheck everything (add AV back later), then do the same in msconfig>Services after Hiding all MS services. Reboot several times to make sure nothing sneaks back in, or turn it off in its Program Preferences or Uninstall it. One more reboot, try AU.

Thanks.

I'll give it a try as soon as possible. I'll update on if it works or not.

EDIT: It worked! I'm writing this on Windows 7 Home Premium right now! Thanks a lot!