I have a HP USB mouse. I just bought a PS/2 adapter for it but the mouse doesn’t work when I plug it into the PS/2 port. I plugged the mouse in while the computer was off than started the computer. The red light on the mouse lights up but the pointer doesn’t move. The mouse will work if I plug it back into the USB port.
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You could also add a USB PCI card. Look at the link below.
http://www.newegg.com/Product/Produ…