Scan your system for Viruses and Malware. Avast, MacAfee, MalwareBytes, etc.) from your system. The first step to resolve the Windows Defender error 'Virus and threat protection is managed by your organization' is to uninstall any other third-party antivirus (e.g. Uninstall Any Other Non-Microsoft Antivirus.
How to FIX: Your Virus & threat protection is managed by your organization in Windows 10. If the computer, doesn't belong to a Domain, then the above error(s) appear after installing a third-party antivirus, or after a virus attack. 'Real time protection is managed by your administrator', commonly appears on business computers where the Antivirus Protection is managed by the domain Administrator. The Windows Defender messages (errors): 'Your Virus & threat protection is managed by your organization', 'Some settings are managed by your organization' & This tutorial contains instructions to resolve the following problem in Windows Defender Security Center: 'Your Virus and threat protection is managed by your organization' in Windows 10 OS.
