i have windows XP in one computer. and because i need more USB ports i order a pci card that say is plug and ready. when i installed in a empty slot star the screen say this device dosen't pass the windows logo test and i click to keep going anyway. well now my mouse is death. i plug another mouse in the back and nothing. i can't do anything. no even enter in safe mode. (f8) no good last configuration. what i notice is that the mouse all ways has a red light under and now not. in another computer works perfect. looks like the usb has no electric power. what you think.