On the Virus & threat protection screen, do one of the following: Select Start, and then select Settings > Update & Security > Windows Security > Virus & threat protection. Save any open files and close all apps and programs. You suspect your PC might have malware hiding on it, but your security software doesn’t detect anything. Windows Security (also called Windows Defender Security Center in previous versions of Windows) detects rootkits or other highly persistent malware on your PC and recommends you use Microsoft Defender Offline. When should I use Microsoft Defender Offline? After rebooting, your Windows defender service will be available.Īlso i suggest you to go through the below link where we discussed the same issue.Microsoft Defender Offline is a powerful offline scanning tool that runs from a trusted environment, without starting your operating system. Step 4: The Windows defender registry has been successfully updated to the system registry. Step 4: Now the system is asking you to merge the registry content into the existing system registry, so click on Yes. Step 3: User account control will ask you for confirmation to run the registry file, so click on YES.

Step 2: Double-click on downloaded windefend.reg file. Step 1: Download the Windows defender default registry file. This Microsoft fixit automatically detects the issue and fixes it automatically.

Run this Microsoft fixit to fix security related issues that could be in Windows Defender Security. What causes this, but most likely it is the presence of certain Other antivirus programs,

Windows Defender Antivirus Service missing, is a problem seen before. Thank you for posting the query on Microsoft Community.

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