Check out the link
http://forums.amd.com/game/categories.cfm?catid=279&zb=5441247
10.1 update has it's own issues
http://forums.amd.com/game/categories.cfm?catid=279&zb=5441247
10.1 update has it's own issues
Since your obviously a noob, it's common for there to be problems with a newer driver, that's why sometimes you have to revert back to the old one.
I never update my driver unless there's a specific fix or performance increase in a certain game or app that I want.
Some people seem to think that if you have a HD4850 or an older card that you always want the latest driver. The latest drivers usually specifically address issues with newly released cards or games.