I have Asus Republic of gamers laptop. It worked great, everything was amazing, until Avast! I download avast few weeks ago. It was "eating" my memory, so I wanted to turn it off. Did not find that. Tried end process, still nothing, so I decided to uninstall it. Waited 10 minutes for uninstall then my screen lagged. Waited few more minutes...still nothing, so I restarted my laptop. Guess what? When I try to go back again, I get black screen. What should I do???