I have a Toshiba laptop Satellite A135-S4427. When I am on yahoo messenger and I receive an instant message from another my mouse cursor freezes up. Also when i watch a video clip on You Tube it does the same thing. Sometime it clears itself when I push Ctrl Alt Del, other times I have to reboot. Any suggestions. I am running XP Professional. The laptop is connected to a wireless connection. Thanks in advance.