Starting Windows Defender in Windows 8/8.1/10 and/or see īut - if you can’t fix it, suggest install a third party antivirus program (which should disable Windows Defender). If the issue continues you may want to try all of the steps listed in Problems If Windows Defender will not turn on Windows 10/8/7 and runs into an unexpected error, perhaps there is something wrong with your. Which occurred after the “patch Tuesday” updates were released. Now, you need to set the service to Automatic. Then, double click on the Windows Defender Advanced Threat Protection Service service. Simply click on Enter to access the Services.

If it doesn’t clear up turn off the computer for a while (15, 20, 30 minutes, whatever) and then restart the computer. That fixed a similar glitch for me back in April Fix- 8 Start Windows Defender service-Starting Windows Defender service on your computer may solve this issue. My windows defender got turned off I don't how but when I tried to turn on windows defender it doesn't let me to turn it on

Windows defender not turning on