Why does my mouse sensitivity keeps changing?

Why does my mouse sensitivity keeps changing

Mouse sensitivity (also known as CPI, DPI) determines how fast the mouse cursor moves. Normally, the sensitivity of the mouse is a fixed value, unless you actively switch it, otherwise it will remain the same. But in some cases, the mouse will suddenly change the sensitivity, and the sudden increase or decrease of sensitivity will catch us off guard and seriously affect our normal operation. This article will help you fix this error by explaining the possible causes of the sudden change in mouse sensitivity and how to fix them.

Why does my mouse sensitivity keep changing randomly?

There are many reasons for the sudden change of mouse sensitivity. Before starting to solve it, you can first understand the possible causes to better match the solution.

  1. Touching the DPI button by mistake
  2. Turn on the enhanced pointer precision function
  3. Outdated mouse drivers
  4. System error
  5. Mouse failure
  6. Mouse driver conflict

How do I fix random mouse acceleration?

Below, we will list some ways to stop sudden mouse DPI changes, hope they will be useful to you.

  • Simple way

If it is caused by a temporary system error or the mouse is out of power, you can try the following methods first.

  1. Disconnect and reconnect the mouse, if it is a temporary connection error, this will solve the problem
  2. Switch the USB connection port (if it is a wired mouse)
  3. Replace the mouse battery to make sure the problem is not caused by a dead mouse battery
  4. Restart the computer to solve the problem of system running error
  5. Connect the mouse to other computers, if the problem no longer exists, then the problem occurs on the current computer, please continue to the solution below.

1. Turn off enhanced mouse precision

“Improve pointer accuracy” The function of improving pointer accuracy is to enable the acceleration mode of the mouse pointer. After checking, the system will give the mouse pointer an acceleration to facilitate long-distance movement of the user, but this will affect the positioning accuracy. The pointer will move a greater distance than expected when moving quickly.

  1. Press the Win key to open the start menu
  2. Enter “mouse settings” and click the mouse settings that appear
  3. In the window that appears, select “Other mouse settings”
  4. Click “Pointer Options” in the third column in the mouse properties
  5. Uncheck “Enhance pointer precision” and click OK

2. Check the mouse DPI button

The DPI button of the mouse is usually located in the middle of the left and right buttons of the mouse. Pressing it can cycle through several fixed DPI gears. Check whether your DPI button works normally. If it cannot be pressed normally, or the mouse DPI value is not switched sequentially after being pressed, then there is a high probability that the DPI button has been damaged, causing the mouse DPI value to switch randomly.

Then, you can also check whether the mouse DPI button is easy to touch and press during the use of the mouse, because it may be that the mouse sensitivity suddenly changes due to accidentally touching it during the use of the mouse.

3. Check the mouse driver provided by the manufacturer

Some gaming mice have a dedicated mouse driver provided by the manufacturer, through which the independent adjustment of DPI, button function, light color, polling rate and many other functions can be realized.

In some cases, reconnecting the mouse to the software will set a new DPI value for the mouse, causing your mouse to suddenly speed up.
Then, you can check the button function assignment of the mouse. The independent driver allows you to customize the function of each button. Maybe your side button or other button function is modified to switch the mouse DPI. Pressing them while you are using it will also cause a sudden change in sensitivity.

Finally, if the program conflicts with the computer hardware or software that comes with the system, it can also cause the mouse cursor to move randomly, which can then be mistaken for sudden mouse acceleration. So, try disabling or uninstalling the standalone program to see if the mouse acceleration problem persists.

4. Update or reinstall the mouse driver

Outdated or corrupted mouse drivers can also cause various issues with mouse usage, such as mouse lag, jitter, sudden acceleration, and more. Therefore, it is worth trying to update your mouse driver. The update method is as follows:

  1. Press the Windows + X keys and select the Device Manager option from the pop-up menu.
  2. Locate Mice and other pointing devices and double-click it.
  3. Right-click the driver below, and then select the option to update the driver, and follow the prompts to complete the driver update. If the mouse driver still does not work after updating the mouse driver, then you can uninstall and reinstall it, the uninstall method is as follows:
  1. Press the Windows + X keys and select the Device Manager option from the pop-up menu.
  2. Locate Mice and other pointing devices and double-click it.
  3. Right click on the driver below and select Uninstall device

To reinstall the mouse driver after uninstalling, just disconnect the mouse, and then connect the mouse again, the system will automatically recognize the mouse device and install the mouse driver for you. Then you can also choose to scan for hardware changes on the page of updating and uninstalling the mouse driver, and then the system will install the mouse driver for you.

5. Run the Hardware and Devices troubleshooter

The Hardware and Devices Troubleshooter can detect problems with computer hardware and then deploy an appropriate solution. Although the program was removed in recent updates to Windows, you can still run it from Command Prompt as an administrator.

  1. Press the Win key to open the start menu, and then enter “Command Prompt”
  2. Type “msdt.exe -id DeviceDiagnostic” and press Enter to open the “Hardware and Devices” window
  3. Click “Advanced”, check “Automatically apply repair measures”,
  4. Click on the next page to start troubleshooting the hardware device
  5. Click “Apply this fix”

6. Run SFC and DISM scans

If your computer has some inexplicable problems that make you want to reinstall the system, you might as well try the sfc and dism command tools before reinstalling the system.

SFC (System File Checker) scans the integrity of all protected system files and replaces them with the correct Microsoft versions.
DISM (Deployment Image Servicing and Management) is a feature in Deployment Image Servicing and Management (DISM.exe) for installing, uninstalling, configuring, and updating offline Windows(R) images and offline Windows Preinstallation Environment (Windows PE) images and package.

You usually don’t have to run DISM commands. However, the DISM command or the System Update Readiness Tool in Windows can sometimes repair the underlying Windows system and allow SFC to function correctly if the SFC command is not working properly or if the corrupted file cannot be replaced with the correct file.

The specific operation method is as follows:

  1. Press the Windows key and enter “Command Prompt” in the search box
  2. Right-click the “Command Prompt” application that appears, and select “Run as administrator”
  3. Select Yes in the UAC window.
  4. A Command Prompt window will open. Here, enter the following command and press Enter:
  • sfc /scannow
  • exe /Online /Cleanup-image /Scanhealth
  • exe /Online /Cleanup-image /Restorehealth
  • exe /online /cleanup-image /startcomponentcleanup

Next, the system will detect the damaged system file and replace it with the correct Microsoft version, if it is stuck in a node, please do not shut down or restart the computer, this process will take some time.


How do I stop my DPI changing?

To stop the change of the mouse DPI, you can set all the gears of the mouse DPI to the same value, but this requires your mouse to support independent driver support, and the professional mouse driver software provided by the merchant can do it.

In addition, you can also use some software that locks the sensitivity of the mouse to fix the DPI of the mouse to prevent the DPI from being modified by other programs.

What causes mouse acceleration?

The possible reasons for the sudden acceleration of the mouse include touching the DPI button by mistake, enabling the enhanced pointer precision function, outdated mouse drivers, system errors, mouse failures, mouse driver conflicts, etc., which can be repaired according to the situation.

Why mouse sensitivity keeps changing in-game?

The reason why the mouse keeps changing sensitivity in the game is almost the same as the reason why the mouse suddenly accelerates on the desktop. The main reasons may include accidentally touching the DPI button, enabling the enhanced pointer precision function, outdated mouse drivers, system errors, mouse failures, Reasons such as mouse driver conflicts can be repaired according to the situation.

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