(12-29-2014, 02:14 PM)nOmnomnOm Wrote: The lifespan of the computer will decrease if it is left on .
Not true.
What is decreasing its lifespan is the moment you power it on.Two words, start current.Thats why most electrical systems gets damaged the moment you turn them on.
Combine that with planned obsolescence and "for the sake of saving energy don't leave your work(or any) PC on" and you have a nice picture.
If you want to save energy there are way more efficient ways then "turn it off when u you dont use it" .