I recently replaced my old PS/2 keyboard and mouse with a Logitech MX3200 wireless keyboard/mouse combo. Per Logitech's instructions, I installed the hardware and software <I>while</I> WinXP was up ...
The 620 does not have any PS/2 ports. This system is running XP SP2. I have reset the BIOS to defaults, and ensured that the USB settings are correct. I've tried all the ports, and the USB mouse works ...