O/S Windows 7 using a logitech HD-compatible optical mouse. Device manager shows this mouse as OK but also a PS/2 mouse with a yellow astrisk When I go to properties for this mouse I get the message This device is not present, is not working properly, or does not have all its drivers installed. (Code 24). When I try to update the PS/2 drivers I get the message that the correct driver is installed I have disabled and even uninstalled this mouse but windows reloads it after a start up. Is there a way to permanently remove this PS/2 device or at least re-install it with the correct drivers.