Some electrical men were working outside when they suddenly turned off our power. The computer was on and fully booted when this happened. Now when I turn it on, it asks it I want to start it in safe mode or revert the settings, etc. Whichever option I choose (I tried them all), windows starts to boot, but then before it's finished, the computer restarts and does the same thing over again. What happened and what can I do to fix it? Please remember that I'm no computer expert. Any help would be greatly appreciated.