If you downloaded an .iso file then you need to burn a CD with a program like Nero that can use the iso file as input.
I did burn it to a cd but I am not familiar with what I need to do with what's on the cd to get Vista to boot back up. It does boot to the disk but there are so many things you can do, I didn't know where to start. Overwhelmed!!
Thanks for the info. I was rolling computer back to an earlier restore point because my printer all of the sudden quit working and I was thinking it may have been due to updates or something. Thought if I restored to earlier point, it may work again. Turns out it was the printer cable. Now I'm kicking myself because I have messed up my computer because of that. I have Windows XP disk and I may have to install that OS.