I never have it turned on. If you are asking if it is just 'ok to turn it off' then, sure, it's not going to effect much, in fact, it could possibly improve system performance (although not by much). As john3347 stated above, it can come in handy, but in all honesty, I have never benefit from it. I would rather clean install the OS over a system restore, but, my system is setup in such a way, that re-installing the OS is a snap.