will19252209

hi im not great with the technical terms or anything and im having to use my fone so excuse the awful spelling. I have a hp pc with windows vista a few days ago it said it was completing a physical memory dump and since then the computer wont load and kept sticking on a blue blank screen, it then the next time gave me the option to restore the pc back to factory condition which i attempted and it just stopped at 80% for hours and hours. I literally have no clue what to do, any help would be appreciated.thanks in advance,deanne