I can run Skyrim with 4k textures and the ENB series and lots of other mods all day without overheating or even crashing. This game doesn't stress my system as much as that does. The temps never gets anywhere near problematic.
I'll give the XP SP3 mode a try but realistically the game client needs a fix.
Forgot to note: I played beta and early access and had no crashes. It wasn't until a patch about 2 weeks ago that these crashes started for me.