Many times, people ask us if they should turn off their computer when not using it, or if it is safe to leave it on overnight. Everybody seems to have heard something different about this one. The truth is, it is absolutely safe, and in some cases even recommended to leave the system on all the time.
All versions of Windows have the ability to schedule tasks such as clean the hard drive, defragment, and other chores. Our suggestion is to leave your system on 24/7, and schedule these tasks to occur overnight while you are sleeping.
We do recommend that you do restart your systems at least once daily, depending upon how heavily it is used. A restart is like taking a nap, it refreshes your system and speeds things up a bit.
It is always recommended that you power down your system during an electrical storm.