I very much appreciate this site. While attempting to "fix" my Compaq Presario F763NR (which runs Vista), I deleted a start up file. Now, when I press the "on" button, it lights up for a second then shuts off and my computer won't turn on. I called HP but they claim there are no longer start up disks or replacement parts available and only tried to sell me a new computer. This can't be true, can it?? I have no idea where the disks that came with the computer are, but I'm CERTAIN I deleted some start up file(s). I know this because the file or files that I deleted for sure contained the letters HP and I believe "exe" was in the extension - I thought HP only made printers so I thought I was only deleting old printer files. Once you stop laughing :-)...Can you help me? I'm broke, unemployed and certainly don't have money for a new computer. You comments are much appreciated.