Sounds like you got a bad PS/2 port or a conflict going on.

Check and make sure the PS/2 port is hooked up to the motherboard correctly if is on a cable (AT style boards). If it's soldered on (ATX), nevermind.

Does it work PS/2 style in safe mode? If so, I would look at a definite IRQ conflict issues, start yanking and disabling hardware until you find the culprit. If not, try another mouse. You never know what can happen with those "cheap" ps/2 mice!

The switch should be on MS, and those adaptors are usually junk.

[This message has been edited by 3fingersalute (edited November 28, 2000).]