Try uninstalling SP2 or use system restore to move back. But you might what to look here first:
About half way down.
I updated Windows XP to Service Pack 2 yesterday. After installing and re-booting, the screen resolution and the colours of my monitor have changed (big icons and only four colours), which makes it look like it was in Safe Mode (which it isn't).
I have tried to change the screen resolution and the colours under Display properties - Settings, but it only gives me the option of a screen resolution of "640x480 pixels" (the slider won't move) and colour quality of "Lowest 4 bit".
I presumed it was a driver issue so I have tried to uninstall the graphics controller in the device manager and re-install it with the latest driver, but it doesn't help. (I might be doing something wrong here, but don't know what that would be...)
I have tried to decrease the hardware accelerator, according to the Windows troubleshooting guide, but this doesn't seem to make any difference either...
I have had no problems whatsoever with this monitor up until yesterday, and just to be sure, I have also tried connecting another monitor to no avail.
I still suspect that it has something to do with the drivers not loading properly after the SP2 update, but doesn't seem to be able to work out what, so any help would be much appreciated!
Computer: Dell GX110 664MHz 256MB RAM
Monitor(s): Old Dell 17" (non-flat screen) and Mermaid Ventura 15" flat screen
OS: Windows XP SP2
Graphics controller: Intel 82810E