rose avegail , it sounds like you are having trouble with your hard drive. Check the computers BIOS and see id your hard drive is still recognized. IF so, I recommend that you get yourself a Live Linux CD and set your boot order to CD first. Place the Linux CD (I prefer Puppy Linux)into your drive and start your computer. See if it boots up. If it does, you can try to reinstall your OS. If that fails, you may have to replace the hard drive. Hope this helps, good luck.