Is it best to keep your computer running 24/7? A friend of mine at Fermi Labs swears by it. He clams server grade workstations are designed to run 24/7. He said he hasn't had any problem for 2.5 years. He claims the surge from flicking the power switch puts far more stress on componets, and hard drives, than just letting it run. He is an engineer in digital electronics at Fermi. What do you say?