|The fastest fix for this one might be to restart it. To do that follow these steps.|
1. press the windows key on the keyboard
2. if it's windows vista or windows 7, type cmd in the search bar and press enter, and go to step 4
3. If it's an older version of windows use the arrow keys to highlight run, push enter, type cmd in the run bar and press enter
4. When the black command prompt comes up type the following command and press enter:
shutdown -r -t 1 /f
that will restart the machine, and hopefully your mouse.