If you’re looking for the instructions to reset Windows Defender in Windows 10, then you have reached the right page to perform it. There is no direct way to reset Windows Defender. So, first, you need to repair it. After repairing the Windows Defender application, you can restore it. To repair the Windows Defender application, you can use a third-party software like FixWin. Download and install the FixWin tool on your computer. Run the repairing tool as an administrator. Once the Windows Defender application has been repaired, perform any one of the methods discussed below to Reset Windows Defender Windows 10.