Turning your computer on & off too often can actually be bad for your hardware, not good. It's not good on your CPU to have it heat up and cool down too often. It makes it brittle. But then again, an argument FOR this method is security... as the safest state a computer can possibly exist in is disconnected from the net/off. And also your electric bill (which Page hit on). But certainly, turn it off once in awhile is good for your hardware, and can extend it's life. How often (if ever) do you give your box an "off day" (or two)? I personally give mine 2 (consecutive) days off, once a month. Usually on a weekend I know I'll be outside most of the time anyway (i.e. fishing). And I yank the power cord out too so there's no energy even running into it at all.