First of all... I installed it, clicked the icon, it started and played, but did not save.
I could have ran it as administrator but instead I uninstalled it, and reinstalled it to C:\games\MarsColonyChallenger to bypass UAC...
Everything works perfectly, including saving now.
So... Here is what I have on this machine here at work. (Yes I am at work, and as a programmer I can pass almost anything off as research.
Especially when it comes to debugging potential problems on this new operating system)
Operating System: Windows 8.1 Pro 64-bit (6.3, Build 9600) (9600.winblue_gdr.131030-1505)
Language: English (Regional Setting: English)
System Manufacturer: Hewlett-Packard
System Model: 500-210qe
Processor: Intel(R) Core(TM) i5-4440 CPU @ 3.10GHz (4 CPUs), ~3.1GHz
Memory: 6144MB RAM
Available OS Memory: 6048MB RAM
Card name: Intel(R) HD Graphics 4600
Yeah, as you can see nothing special.
As for applications
Steam
Miscrosoft Visual C++ Express
Adrioid OS Development tools
TrueCrypt
Java SDK
Kapsesky Antivirus
Gnomoria & Starbound <-I think one of these installed directx 9.0c so I did not have to.