Hello i use a Asus G1 gaming series laptop, its a core duo 2.0ghz with 512 mb nvidia 7700 (not virtual memory). Before when i first bought it, I play world of warcraft on it and everything seems fine, the fps wasn't the best but it was around 50-60 but today i tried play it on this lap and its only giving me 14 fps, i tried restarting the computer and its the same thing, I have also noticed that many things has been slowed down including the smoothness of scrolling the bar in MSN messenger and typing here, eveyrhing is like spiky, not that smooth like before, any help?? Thank you!

You might try a System Restore to a point prior to your problem:

start > All Programs > Accessories > System Tools > System Restore