So a year or two back I put a 70 GB hard drive in my computer in addition to my 500 GB drive. My buddy and I installed Linux on it for fun and I can't remember what we did but since then when I booted the computer a menu would appear and I had to choose which one to boot from. I just repartitioned the 70 gig drive with Linux on it and formatted it. Changed the boot order in startup to my 500 gig drive with windows 7 on it. The 70 gig also has windows 7 on it now but when I start my computer it tries to open the menu but just sits at a black screen with a white underscore blinking at the top. I am at a total loss and anything would be a big help.