Media for Alternative to Kerio 2.1.5 with easy interface?

Hello

I'm getting BSOD's on a new PC on which I installed Kerio

2.1.5, like I do on the PC's I have. So I guess it's time to move on.

At this point, I tried Sunbelt Kerio, Outpost, Comodo, and Jetico: None of them has the ease of use of Kerio :-/ They're a pain to configure.

Are there others I should look at, or are those the best there are?

Thank you.