Windows 10 Enterprise 2016 LTSB v.1607重启后Windows Defender被组策略禁用求助

Hey there, let's tackle this Windows Defender issue you're dealing with after that unexpected crash and restart. The "Turned off by Group Policy" error typically pops up because some system settings got corrupted during the crash—here are actionable fixes to get Defender running again:

• Press Win + R, type gpedit.msc and hit Enter to launch the Local Group Policy Editor.
• Navigate to Computer Configuration > Administrative Templates > Windows Components > Windows Defender Antivirus.
• Locate the policy named Turn off Windows Defender Antivirus, double-click it.
• Set the policy to Not Configured or Disabled, then click Apply > OK.
• Restart your PC and check if Defender is now enabled.

⚠️ Warning: Editing the registry can cause system instability if done incorrectly. Always back up the registry key you're modifying first by right-clicking it and selecting Export.

• Press Win + R, type regedit and hit Enter to open Registry Editor.
• Navigate to this path:
  HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender
• Look for a DWORD value named DisableAntiSpyware. If it exists, double-click it and set its value to 0.
• If the value doesn't exist, right-click the Windows Defender key, select New > DWORD (32-bit) Value, name it DisableAntiSpyware, and set its data to 0.
• Close Registry Editor and restart your computer.

• Open Command Prompt as Administrator (right-click the Start menu > select Command Prompt (Admin)).
• Run these commands one at a time, pressing Enter after each:

  sc config WinDefend start= auto
  sc start WinDefend
  

• Next, reset Defender to its default settings with this command:

  "%ProgramFiles%\Windows Defender\MSASCui.exe" -reset
  

• Restart your PC and test if Defender functions properly.

Sometimes even uninstalled third-party antivirus tools leave behind files that block Windows Defender. Head to Settings > Apps > Apps & features and scan for any unfamiliar antivirus programs or remnants of ones you've removed. Use the official removal tool for that antivirus (if available) to fully clean up its files, then restart and try enabling Defender again.

内容的提问来源于stack exchange，提问作者zar