# CPNMouse | ## Multiple Mice in Windows

Unable to install device driver
If you are unable to install the device-driver, the problem is most likely that the installation script is not configured for your mouse. This only happens for USB mice, as all serial and PS/2 mice should be recognised with no problems. You can easily fix this yourself. Simply follow the instructions below.
Windows 2000/XP/2003
Open Start -> Programs -> Accessories -> System Tools -> System Information. If this is not available on your computer, you may also be able to use BusHound to obtain the information. In this program select Components -> Input -> Pointing Devices The information in under PNP Device Id is what you need. It is in the form USB\VID_XXXX&PID_YYYY\<something> You need the numbers XXXX and YYYY You must add a line to `cpnmouse.ini`. The line is "%CPNGroup.DeviceDesc1% = usbinst, HID\VID_XXXX&PID_YYYY", where XXXX and YYYY are the numbers found earlier. You should add the line just after the other lines looking just like it If you send the numbers to me, I will add them to the distribution