this is a site i found to get ATI graphics drivers...
http://www.amd.com/us/Pages/AMDHomePage.aspx
hopefully this helps you. if they are blue screens they will have an error code... there are two types of BSOD's...
-Ones that do a memory dump then restart the computer within 5 seconds. most of the time this type will have a specific file that is causing the problem... should be a .dll file
towards the bottom above the Hex code it displays.
-Ones that just sit there and look dumb... these usually don't have the specific file causing the problem.
i will explain how to find these blue screens. i think there hidden within the computer.. there is a way to activate a windows system recorder or something like that. i will post this when i find everything else out...