device manager: I tried a usb mouse and I get(this device is installed properly) but there is no pointer on my screen ?when I plug the ps2 wheel mouse in i get this device is'nt working properly because windows cannot open a file vmouse.vxd that loads the drivers for this device. (code8) then is says to fix this problem run windows setup with a cd rom disk.Which I have done,only to recieve the same message again.