Error: 0x8004ff04 – How to Remove Microsoft Security Essentials from Windows Server 2012R2 or Server 2012.

1. Navigate to Control Panel -> Programs and features.
2. Select the Microsoft Security Essentials 
and click Uninstall.
 Without closing the “MSE installation error” window (see screenshot below), press CTRL + ALT DELETE and open the Task Manager.

Security Essentials uninstall error 0x8004FF04

3. At the ‘Users’ tab, right click at Microsoft Security Essentials Client Setup process and choose Open file location.

Uninstall Microsoft Security Essentials Server 2012

4. Then right-click at the “Setup.exe” file and select Properties.
5. At Compatibly tab, select Run this program in compatibly mode for Windows 7 and click OK

remove microsoft securty essentials server 2012

6. Now, press the Windows + R keys, and then drag the “Setup.exe” file to the RUN command box.


7. Then select and copy (CTRL + C), the full path of the “Setup.exe” file, from the RUN command box.
8. Open command prompt and paste (CTRL + V) the copied path.
9. At the end of the copied path, type “/disableoslimit /u” (without quotes) and press Enter:

e.g. At this point you should have a command, like this:

  • C:\Users\Administrator\AppData\Local\Temp\{7F98308D-43D2-4B63-84B0-B8476794125B}\Setup.exe /disableoslimit /u

10. Finally click Uninstall and follow the rest prompts, to completely remove the Microsoft Security Essentials from your server.