Double Click Test

Prove that the mouse is clicking twice, not you.

100% LocalFree

Last gap

Double clicks seen

Under 50 ms

How to test for a double clicking mouse

1 Single-click the pad, slowly and deliberately, twenty or thirty times. Do not try to double click: the fault you are hunting produces the second press by itself.
2 Watch the gaps. A deliberate click lands hundreds of milliseconds after the last one; anything under fifty is mechanical bounce inside the switch.
3 Drag something on the desktop as well. Chatter often shows up as a drag that drops halfway, which is the same fault seen from another angle.
4 One stray reading can be a slip of the finger. A switch that is genuinely worn will flag several within a minute of ordinary clicking.

Why does my mouse double click on its own?: The metal contact inside the switch loses tension with age and bounces as it closes, sending two presses where you made one. It is wear, not software, and it gets worse rather than better.
Can it be fixed?: Sometimes. Cleaning or bending the contact leaf back into shape buys time, and replacing the switch fixes it properly if you can solder. Many gaming mice carry a two-year warranty that covers exactly this, so check before opening anything.
Could it be Windows rather than the mouse?: The double-click speed setting changes how quickly two presses are treated as a double click, but it cannot invent a press. If the gaps here are under fifty milliseconds, the hardware sent them.
Why 50 milliseconds?: Because it is comfortably below anything a human hand produces. Even fast deliberate double clicks land around 100 to 200 milliseconds apart, so a gap half that size did not come from you.

Every button, both wheel directions, live movement.

Clicks per second, over one second or a full minute.

Find the key that stopped answering.