Sorry I don't use a laptop, there was no Desktop tech support category. Recently I was using an Elgato HD60 on my computer (Windows 8.1) . It was working fine until I was stupid and I went to display settings and started to mess around. In display settings there was an option called main monitor or something and the options were "Elgato" and my actual monitor. So I selected Elgato as the only monitor to be displayed and now the screen goes black. Normally there would be a box that would pop up that would revert back to the original settings if you don't click accept, but nothing happened when I waited. So I then decided to restart my computer, and nothing at all happened. My computer had restarted, I heard sounds when it booted up, but it was black the whole way through. Does anyone have any suggestions to fix this?