Anti-malware and the anti-virus protection suite Windows Defender now comes pre-installed with the latest, Windows 10. It’s fairly decent in keeping your computer safe from various security threats, though it doesn’t hold up to other free and paid alternatives out there. Windows Defender is also smart enough to disable itself when you install a compatible third-party anti-virus, but Microsoft doesn’t make it easy to turn it off permanently on your own. Disabling Windows Defender can open your computer to threats.
Find the Windows Defender icon in the status bar and double-click it. If it is installed, you can also find it under C:\Program Files\Windows Defender. Choose Tools from the top-bar. Then choose Options. On the left-hand side, click on the Administrator. On the right-hand side, uncheck the box named Use this program. Click OK.