Hi, I build my own PC and everything works fine. The only problem is the CPU fan. I bought it new (Cooler Master Hyper T4 CPU Cooler with 4 Direct Contact Heatpipes RR-T4-18PK-R1). I don't really know if is the best fan but the CPU temp stays between 50-65. Today I remove the fan and put a new thermal paste. The CPU temp went down to 40-55. Still is bad and I don't know what to do. Also, do you know what causes 0xc000007b. I been having problem when trying to open download games. Every time I download a game (Dark Souls, Skyrim V, Next Car Game), they give me that error. I tried to download and play a steam game and it open fine. I had played others game before like The Witcher 2 and they work fine, now I don't get it.
Those CPU temps are perfectly normal for both Intel and AMD CPU's. And with the error that you are having with the games, it's a well known error, just google it and try the troubleshooting steps from the Microsoft Website.