We're not sure yet if mulmouse.exe and MultiMouse Application are a virus, spyware, or a different kind of harmful program. If you are familiar with this file or process, please post a comment with your experience with mulmouse.exe.

If you use the internet, there is always a chance that adware or malware could be on your hard drive without you knowing it.

This free hard drive scan is probably the best way to make sure you don't experience future issues with bad files.