Fairly often (not sure why) but my touchpad on my Dell Studio laptop becomes stuck. This means that I cannot move my mouse at all.
Clearly, having your mouse stuck presents an issue.
Thankfully, I found the solution. Here's the 'quick fix'.
First, hit the 'Windows' button on your keyboard (presuming it's a Windows keyboard). You'll get the app launcher.
Type in 'Terminal' and you'll see the terminal icon listed. Use the arrows on the keyboard to select it and press Enter.
When the terminal launches, type:
Text Snippet:
$ sudo modprobe -r psmouse
$ sudo modprobe psmouse
That's it. Mouse works!
Now, granted you could make that easier by creating a script to do it automatically using a single command, but hopefully you won't need it that often.