This place always deserves a recommend. Imho, it's even better than Black Viper. That might have something to do with how the owner lays out the site, and the systems he covers... XP, Vista, 7, 8. Win10 will be in there soon, I'm sure, or even in pre-release form.
Anyway I think it's a sane, grownup sort of tweak site that won't lead you wrong. TEG is where I first went when I wanted to know about things like Windows services, what could be disabled or not, with explanations along the way. Maybe that's why I always liked the place. The author seems more (talkative), more attention paid to detail. Frankly I don't know how he keeps it up like he has, for well over a decade now.