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.
While holding down the Windows key, press the R key. Alternatively, go to the start menu and search for Run and open it. Type in gpedit.msc and click OK. Head to Computer Configuration > Administrative Templates > Windows Components > Windows Defender Antivirus. On the right-hand side, double-click on Turn off Windows Defender Antivirus. Choose Enabled and click OK. Restart your computer.