After installing SP1 two of the programs i use the most started freezing a bunch, Firefox 2 and a media player i use. The media player is old so i'm not athat surprised, but I use it all the time pre sp1 with no problems.

I was wondering if it's painful to revert, and if not how do i?

It SHOULD be easy to uninstall SP1. Goto programs and features and then View installed updates. Find Service Pack for Windows and uninstall it. However it can be a b***h. Take a look here http://www.msfn.org/board/Uninstall-SP1-RC...P1-t114362.html

I had no problem removing it using add/remove programs in the CP. Just click show updates at the top.