Hi I found an old HDD (I think it crashed back in the day) and thought I'd give it a try and maybe recover some old files I had there; so I disconnected the current HDD and replaced it with the old one. But of course it didn't work, got a "BOOTMGR is missing" during boot up. Then I tried another old HHD that I knew had worked before but I got the same "BOOTMGR is missing" error. But now when I connected the original HDD again, the PC won't boot up anymore. I get this weird boot up screen that I've never seen before (sorry for the crappy huge picture but I hope this will do)- http://i18.photobucket.com/albums/b113/Orpheus666/P7150025_zps98c7193d.jpg There used to be a lot of some kind of lines of text that ran down but now there's only this box. I have no idea what to do. Any advice is welcome! EDIT: Forgot to mention I can't access BIOS because I only get a black screen with a blinking underscore sign when I try to do so.