Hi there, its a cord mouse, just the new dual optic one. I have a standard cherry keyboard. It works fine with the drivers using the ps2 port. I have tried removing the drivers booting up with the old MS optical explorer mouse i had also using ps2 and putting the new mouse into the usb port whilst windows is running. It detects it, the mouse works but i reboot and the same crash problem. However xp boots into safe mode using the new usb mouse connection. Im not sure wat else i could do. Im a bit puzzeled.