How to Check if Your Windows PC is Joined to a Windows Active Directory Domain

 

1. Open Command Prompt (Run as Administrator)
   • Press Windows Key + R then enter CMD in the Run window that appears.
   • Search the Start Menu for Command Prompt.
     
     
2. Enter systeminfo | findstr /B "Domain" in the Command Prompt window, and press Enter
   
   
3. If you are not joined to a domain, you should see 'Domain: Workgroup'. If you see something other than Workgroup, then you are likely joined to a domain.

Windows 11 Cannot Open Windows Security

You can also use PowerShell to reset your Windows Security app package.
Launch PowerShell with admin rights and run the following command: 

Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage.

Then close the PowerShell window and check the results.