Adapted from the KeyboardTester.click mouse-acceleration guide, originally published May 1, 2026 and updated September 16, 2026.
A mouse can feel different on the Windows desktop, inside a browser test, and in a game. That does not automatically mean the sensor is faulty. Those environments can read and transform movement through different input paths.
The useful question is therefore two-part: which setting is enabled, and which movement path are you actually testing? Here is a practical way to keep those questions separate.
1. Inspect the Windows setting directly
In Windows 11, open Settings → Bluetooth & devices → Mouse and look for Enhance pointer precision. Microsoft's current mouse-settings instructions show that control on the Mouse page.
If your Windows version does not expose the direct toggle:
- Open Additional mouse settings.
- Choose Pointer Options.
- Clear Enhance pointer precision, then select Apply and OK.
You can also press Win + R, enter main.cpl, and open Pointer Options there. Reopen the setting afterward to confirm its state.
With pointer acceleration, the speed of a physical movement can affect how far the desktop pointer travels. Disabling Enhance pointer precision removes that Windows pointer adjustment. It does not set your hardware DPI, repair a sensor, or guarantee that every game responds differently.
There is no universal requirement to turn it off. Acceleration can be useful for moving across a large desktop while preserving small, careful movements. Choose the desktop behavior that suits the task, and investigate a game's camera movement separately.
2. Keep raw input separate from desktop pointer movement
Microsoft's RAWMOUSE documentation explains that raw mouse input is not subject to the mouse-speed setting in Control Panel's Mouse Properties sheet. A game using that path can behave differently from the ordinary desktop cursor, while still applying its own sensitivity or other processing.
A browser test also needs an appropriate input mode before it can claim to use raw movement. Pointer lock with unadjustedMovement is one relevant browser API, with compatibility considerations. Receiving ordinary pointer events is not the same thing.
The KBT mouse-acceleration comparison records ordinary pointer positions during a button-held drag. It does not use that raw-input mode, read the Windows checkbox, or measure the physical distance your hand traveled.
That makes it a comparison of movement delivered to the browser, with practical limits—not a sensor certification.
3. Make the slow and fast passes comparable
Use a physical mouse and keep the same surface, DPI, Windows pointer speed, browser zoom, and display scaling throughout the comparison. A touchpad is not a substitute: its processing can differ.
- Mark a short, straight distance on the mousepad with a ruler or removable markers. Leave enough cursor space to avoid the screen edge.
- Position the mouse at the physical start marker and the cursor inside the test pad.
- Hold the mouse button, move slowly to the end marker, then release. The tool records a drag, not a button-free swipe.
- With the button released, return both the mouse and cursor to their starting positions. Lift and reposition the mouse if needed; do not record the return movement.
- Hold, drag faster over the same physical distance, and release. If the pass is so short that the tool treats it as an accidental tap, repeat it.
- Record the two distances and ratio. Select Reset after each completed pair and collect at least three pairs.
Three pairs are a practical consistency check, not a laboratory standard. If the numbers fluctuate widely, improve the distance control and avoid screen edges before interpreting them. To compare Enhance pointer precision on versus off, change only that setting and repeat the same procedure.
4. Understand what the ratio measures
The displayed ratio is:
fast recorded pixel distance / slow recorded pixel distance
The engine adds movement segments from browser pointer positions. In simplified terms, each segment has a length like:
Math.hypot(currentX - previousX, currentY - previousY)
Those coordinates come from pointer events in the page; they are not a ruler reading from the mousepad. Curving or shaking the mouse can change the recorded path length even when two movements end at the same position. Event sampling and screen boundaries can affect the comparison too.
| Repeated observation | Useful interpretation | What it does not prove |
|---|---|---|
| Ratios near 1 | The browser recorded similar distances in these passes. | That the sensor is perfect or acceleration is off in every game. |
| Ratios above 1 | The faster pass recorded more movement; recheck the Windows setting and equal physical travel. | Which software layer caused the difference. |
| Ratios below 1 or inconsistent results | Recheck travel distance, path shape, screen edges, and sampling. | That the mouse necessarily has deceleration or a hardware fault. |
The tool's labels, including “perfect” and “acceleration detected,” summarize its ratio thresholds. Treat the measurements as clues and confirm the relevant OS or application setting.
5. Test the symptom you actually have
Movement scaling, event rate, and latency are different questions:
- The mouse event-rate test observes events delivered to the browser. Its reading is not a raw USB polling-rate certification.
- The browser input-timing check compares event timestamps with handler time. It does not measure complete physical mouse-to-screen latency.
- The mouse-button and scrolling check is more relevant when clicks or wheel actions are missing.
For a game, keep DPI and in-game sensitivity fixed and use the same practice scene. Check the current options and documentation for that game version. A desktop setting can change menus or the Windows cursor without changing camera rotation; no fixed aim improvement follows from one checkbox.
If Enhance pointer precision appears to turn itself back on, first confirm that the setting actually changed. Then recheck after the specific event you suspect, such as signing in or launching a mouse utility. A recurring registry script can hide the trigger rather than identify it.
The full Windows 11 guide includes troubleshooting, related diagnostic tools, and Mac/Linux notes. Start with the setting, control one variable at a time, and interpret each result within the input path it measures.
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