My colleague is using windows XP P4 with 1.7 GHz 40 GB hdd and 128 MB Ram. very recently his Mouse Microsoft PS/2 stops responding and when i checked in the device manager i couldnot find the Mice or mouse in the device manager list. again i cheked in the control panel and there too in the mouse properties it is blank. i thoght it is the mouse problem and i connected the same mouse to other computer but to my surprise it is working fine and i came to comclusion that the PS/2 port of the motherboard is damage, and to confirm my point i brought another mouse and copnnected but there also it is working fine. Now i am in dillema whats is worng with the system. therefore i seek all of your genuine solution please .