Mouse keeps right clicking on Mac

Problem

Whilst using your Mac,  the mouse keeps right clicking. You may not even be touching the mouse or trackpad.

Solution

1. Turn off the computer.
2. Turn it on and hold down the Shift key to start the Mac in Safe Mode.
3. Go to your User Library folder.
4. Open the LaunchAgents folder.
5. Move all the files in the folder to a new location. Advanced users may have reasons to keep some files.
6. Restart the computer.