AV issues with Windows 8 Build 7955

[Bryan Smith]

I've been playing the Windows 8 Build 7955.
I went out and downloaded Microsoft Security Essentials thinking of all the AV products, this would work.
Wrong!
It came back with an error that basically said MSE is not compatible with this version of Windows.

This is where I stopped.

What AV, if any, are you fellows running with this Windows 8 Build 7955?