Now that temps are under control you might want to do a fresh fresh install. That drivers issue is very annoying, rather than trying to fix it I'd be inclined to download up to date installers for everything and stick them on a memory stick and go through them one at a time on a fresh install.
Also you can get a second opinion of CPU temperatures from something like CoreTemp, but no, that screenshot doesn't suggest 75 degrees, more like 35, which is good. Your usages look fine, they'll wobble around from 0-100% as needed.
Also you can get a second opinion of CPU temperatures from something like CoreTemp, but no, that screenshot doesn't suggest 75 degrees, more like 35, which is good. Your usages look fine, they'll wobble around from 0-100% as needed.