Gateway PC, vista home, bout 5 years old. Was acting fine earlier in the day but when I turned it on, it only gets to the screen where it asks how do you want to start (safe mode, command prompt etc). No matter which one I choose it starts over again. Tried booting from disk, and only got a colorful screen but no prompts or information. Trying to avoid reformatting, have a lot of pictures and music I do not want to lose. Please please please help