This is such a simple thing, but I cannot find the solution on web. Everyone said go to "Power option" and choose "Restart". But mine DO NOT HAVE SIMPLE RESTART!!! It is "Update and Restart". That cause me a lot of trouble. I click that, it actually tried to update.....and FAILED. It had to reinstall back to original and it took 2 hours!!!! Win 8 is not stable, things got stuck and I suspect I need to restart it like once a day!!! It is inconvenient not to be able to do it. Why in the world MS gave up Win 7 and move to Win 8? Win 7 is about the best after XP.