Ok, so i use my computer all the time, and with school in full swing, i have a lot of work to do on it. I find that i leave it on 24 hours a day, almost non stop. Infact, i cannot remember the last time i turned it of for more than a few hours. Is this good or bad? I remember hearing that it was bad and harsh on the computer to keep turning it off and on. (wives tale?) I see no ill effects from this. I bought the computer brand new in october, and the logic board was replaced about a month ago. I do put it in sleep mode some times.