Lenovo computer won't load anything?

Windows was installing an update all night so I turned the computer off. When I turned it back on it loads completely fine, then when I click on anything such as chrome to load and a grey screen pops up and then go back to the home screen not loading any programs.
I tried to do a factory reset and it was unable to complete.
Can anyone suggest a way at home to fix it or any idea of how much the cost to fix would be?