Hello there I have a thing that puzzles me. It happens randomly; windows fails to load my graphics card driver when I boot my computer. If I go to device manager it displays the driver is missing. I can fix it with a reboot. I have tried to: Reinstall W7 x64 which didn't work. I eventually installed Vista x64 (had a lot of problems with W7!! Vista runs smooth on my system :banana: ) and windows is up to date Install driver version 188.18, 197.13 and 197.45 (clean install yes) Run memtest and harddisk check (no errors) Load BIOS default settings Updated my BIOS Btw I have recently installed another harddisk. I have installed Windows on a new WD 500GB. Any ideas?