|Does your keyboard still work? Is your keyboard also PS/2 type? |
If your keyboard works then you can maneuver in Windows by using the Windows key and Tab, enter, esc, etc.
Go to Device manager to see if your mouse is listed there and if it states it is working properly.
Connecting or disconnecting PS/2 devices while under power can damage the PS/2 controller.
If you get into Device manager delete ALL listings for mice and then reboot. Be sure to exit the right way by using the keyboard.