Sidney Abbot

Tonight I tried to update my display driver as i keep getting a message that my display driver has stopped working. When I tried to do the update it is not saving to my computer and is reverting back to the old driver which is an ATI Mobility Radeon HD 4670. I was trying to update it to AMD Catalyst Driver 12.1. It seems to download but I do not see it and when I log onto Second Life I receive a message saying Second Life cannot run because my video card did not install correctly. I feel like i am going in circles. Now i cannot even get back on SL. It also said to contact the portal if there are issues. Well here I am and i am hoping someone can please help me. Sidney Abbot