hey i just updated my computer from windows xp to windows 7 the first time it didn't work so i deleted everything off the hard drive and then did it again , and the second time it did work. i installed all other drivers i needed , but the video resolution is stuck at 640x480. when i was on xp i used to use 1024x768 but it's too big to see everything. i tried to install drivers from the website but idk what to do. using a dell optiplex gx260 default motherboard and onboard graphics. and dell e773c monitor. thanks in advance.