If it's a PS/2 mouse, then unplugging/replugging it as described, with the system powered up, could well be what's caused the problem. You should NEVER connect or disconnect a PS/2 mouse with power to the motherboard, because the socket is liable to 'blow' and the motherboard rendered useless for a PS/2 mouse. Same goes for a PS/2 keyboard!
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Grandad
Offline 3,826 posts
since Mar 2004