My PC Break Down ~Oh My God

Oh my god, my computer break down already. Don't know why, yesterday i turn on my computer, when just get into the windows, whole computer was lag into there, and i also cannot press any key, any button. Then i have try to restart my computer, same problem was occur. I have no idea, just go to try for repair the windows, after i repair, all the button, key was getting well. Then i continue to playing my game. After i restart my computer again (because was update something), my computer was getting the same problem, lag lag....feel so sad for this problem...