Method 1: Enable / Disable Scroll Inactive Windows 10 Step 1. First of all, you go to Settings > Devices > Mouse & Touchpad. Step 2. Then you find the Scroll Inactive Windows option and disable / enable it. Step 3. You try disabling and enabling this option a few times and check if the problem is resolved.
Method 2: Windows 10 Mouse Lag Fix By Changing Palm Check Threshold Step 1. Navigate to Settings > Devices > Mouse & Touchpad. Step 2. Then you select Additional Mouse Options. Step 3. When Mouse Properties windows appears, you go to TouchPad Tab and click on ClickPad Settings. Step 4. Then expand Pointer, click on PalmCheck-Enhanced, and click on the gear icon. Step 5. On the PalmCheck-Enhanced properties, you find the Palm Check Threshold and move it all the way to the left. Then click on Close, then Click on OK.
Method 3: Reinstall Mouse Driver Step 1. You open Device Manager in Windows 10. Step 2. Now you find and expand Mouse and other pointing device. Step 3. Then right-click the name of your mouse and select Uninstall. Step 4. When Confirm Device Uninstall opens, you Click OK then select Yes to restart your computer.
Hope this tutorial can help you fix mouse lag Windows 10. Source: http://howtoinstallwindows10.com/windows-10-mouse-lag-fix/