I'm having trouble getting exchange 2013 SP1 to install on Server 2008 R2 SP1. After it checks for Prerequisites it states it's an incompatible operating system and refers me to compatible operating systems.
All updates are installed, including optional. I have a couple KB issues that I'm struggling to get installed as well. KB2619234 runs, sits at full bar of installing and never finishes. One other KB which I'm not able to post right now.
I can sort out the KB issues I think, but not sure how to force it to install when it thinks I'm not on a valid OS version.