Go to your Windows menu and open settings.
Open the devices section of your settings. This is where you control all the settings for your mouse, keyboard, printers, any bluetooth devices, etc.
Navigate to the 'Mouse' tab.
Select 'Additional Mouse Options.'
Select the 'Pointer Options' tab.
The 'enhance pointer precision' box is checked by default in Windows 10, and is the setting responsible for mouse acceleration. Unchecking this box turns off mouse acceleration, ensuring that your Windows settings won't interfere with your in-game mouse sensitivity settings.