I know you probably see posts like this all the time, but I've been looking all over and I can't find anything. So I was trying to dual boot with Ubuntu 13.04 32-Bit, and I used Unetbootin. The flash drive was 4GB, but I didn't format it to FAT32. I dualbooted it, it worked fine, and I did the try before install thing. It worked sucessfully. I shut down and rebooted it again the next day, and tried to install it. I chose all of the options that would work for my computer, and it was installing, but it took a very long time. It just showed the Ubuntu screen with five dots beneath it. It was at night so I thought I would check on it in the morning, (this was after like an hour of it installing) but it still showed the same screen. I decided to try BackTrack 5, and I used Unetbootin again. I downloaded BackTrack 5 R1 (because R1 was the only version listed in Unetbootin) Gnome 32 bit, and repeated the procedure, exactly as directed. I tried booting it up, and it said Missing Operating System. After many failed attempts fixing it, I tried using Oracle Virtual Box. I set up a machine for Ubuntu and for BackTrack. Again, I did the exact same settings as the tutorial videos and articles used, but it still didn't work. I don't know if I am giving enough information, but I would greatly appreciate any help I can get.