This hack allows you to install Microsoft Security Essentials (MSE).

Microsoft Security Essentials is designed for Windows 7 and is not compatible (nor supported) on Windows Server 2012.

But if you insist, you might as well end-up installing it on your Windows Server 2012.

1. Download a copy of MSE from Microsoft: http://windows.microsoft.com/en-us/windows/security-essentials-all-versions
2. Right Click on the „mseinstall.exe“.
3. Click on Properties.
4. Click on the „Compatibility“-tab.
5. Locate the „Compatibility mode“-section.
6. Check „Run this program in compatibility mode for:“.
7. Select From the (now active) dropdown menu „Windows 7“.
8. Open a Command Prompt as Administrator.
9. cd to your Downloads folder (ie. cd C:\Users\%username%\Downloads).
10. Run „mseinstall /disableoslimit“ and follow the installer prompts to install MSE on your Windows Server 2012.