It's not that bad ... I am already up and running on Win 8 Pro and have GameEx running. Nice thing with these computers I have swapable HD bays so they just plug in without taking the computers apart. Just have to re-install a few programs. My Win 8 computer is just a tad slower than the one that went down, but I swapped the video cards out since the NVidia GTX670 is faster than my ATI HD7870 but that only took a 5 mins.