Windows Security Says Defender Is Off After Every Restart, Even Though It’s Enabled
Asked by
MellowPine47
After I start my PC, Windows Security repeatedly shows a notification saying, "Turn on virus protection. Virus protection is turned off. Tap or click to turn on Microsoft Defender Antivirus." However, when I open Windows Security, Real-time protection, Dev Drive protection, Cloud-delivered protection, Automatic sample submission, and Tamper Protection all appear to be enabled. What could be causing this warning, and how can I stop it from appearing after every reboot?
Answers
If system repairs and service checks do not help, an in-place Windows repair using the official installation media can refresh damaged security components without immediately wiping your files. A clean reinstall should be a last resort, after backing up important data.
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If the notification keeps returning after you dismiss it, try repairing the Windows system files. Open Command Prompt as administrator and run "sfc /scannow". After that finishes, run "DISM /Online /Cleanup-Image /RestoreHealth" and restart the computer.
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This can happen when the Windows Security service or Microsoft Defender takes too long to start. On slower systems, the notification may appear during boot even though protection becomes active a little later. Check whether the warning disappears after waiting a minute or two, and verify that the related security services are set to start automatically.
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NimbleCedar23: That’s a good first step. It’s also worth checking Task Scheduler for old antivirus-related tasks that might be interfering with Defender during startup.