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What is Dirty Mouse?

Dirty Mouse is a free, harmless prank program from RJL Software that simulates a malfunctioning mouse by periodically freezing the cursor in place. The victim will think their mouse ball is dirty, their optical sensor is blocked, or their mouse is simply broken. It is a classic prank that drives people to physically inspect their hardware while the real culprit runs silently in the background.

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Added: Feb 27, 2026   |   Last Updated: