* Press Win + R from your keyborad, type regedit.exe in Run dialog box, and click OK button. After you do that, repeat the above steps to enable Microsoft Defender Antivirus again. In this case, you’ll have to uninstall your third-party antivirus app. Hi, As the remediation problem, the root cause of this is that third party antivirus has disabled Windows Defender from starting, but in the same time the. NOTE In order to re-enable this protection, perform Steps 1 through 3 again but this time. It might have greyed out the Real-time protection setting, leaving you unable to switch Microsoft Defender on properly. You could try the tips to resolve the problem. Figure 8.18 Disabling File System Realtime Protection 3. Once something change the related value data in Registry Editor of Windows 10, the built-in Windows Defender Antivirus will have the Real-time protection not working and get “ This operation returned because the timeout period expired. This operation returned because the timeout period expired. However, I notice that the Real-time protection switch is set to turn off in Windows Defender Security Center setting with the error “ Real-time protection couldn’t be turned on. Today the system becomes was unresponsive and I have to hard power it off completely and then power it up again. After the tablet is upgraded to Creator Update, I let it run a full scan overnight. My Surface Pro 3 hasn’t installed any third-party antivirus in Windows 10 so I use the Windows Defender for protection.
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