Microsoft Security Essentials is not compatible(supported) on Windows Server 2012 R2, however there is a workaround to get it installed:
- Download MSE from Microsoft: http://windows.microsoft.com/en-us/windows/security-essentials-all-versions
- Rightclick on “mseinstall.exe”
- Click on Properties
- Click on the “Compatibility”-tab
- Check “Run this program in compatibility mode for:”
- Select “Windows 7″
- Open a Command prompt as Administrator
- Run “mseinstall /disableoslimit”
If windows update later on fails updating MSE, you can redo the process above and it will upgrade your windows essentials. You don’t need to uninstall it inbetween.
