I have moved m 400XPS pc to a monitor that does not have a Vista Driver (1905FP) and keep getting a BSOD upon reboot with atikmag.sys showing up on it. The system now seems sluggish also with errors from time to time. Is there something I can do to fix it? Should I go back to the Radeon X600 driver from January 2007 when Vista first came out? Is there a atikmag.sys file somewhere I can get rid of? Help.