Hello everyone. Im running windows xp home and when you bring up my computer the window shakes and flutters, but if you hit one of the arrow keys it stops and is just fine untill you reboot the comp. Is this a problem with the keyboard or something else? Thanks.

One of your keys on your keyboard is stuck down

When it starts shaking again, don't touch the keyboard, just open Notepad (or wordpad) from clicking on the Start menu->All Programs->Accessories->Notepad

You should see the key (ie the letter usually) repeat itself across the document, until you stop it by pressing any key on the keyboard

Try cleaning out the keyboard (turn upside down and tap underneath) or even vacuum it ! (or possibly replacing it)