Well if u running windows 7 or anything close to it..try pressing the windows button or ( start button)
the right click Computer---- Properties
the on the left u should see a tab called device manager click on that
The u should see something called display adapter
Click on that and something should pop down
right click on what pops down and there should be a button thats says update driver.
it will open up another window and click search automatically
Try that see what happens
Ps.. or just do what Thomy linked
