I have a Dell Dimension 2400 and I need to downgrade it to XP. I am using WIndows Vista Home Premium and I have 2 different install discs for XP. When I try to install it nothing happens or it asks me to restart the computer. I have the CD drive as the first on the boot list and it doesn't do anything. I cannot find any ways to wipe the hard drive to do a fresh install. I have looked at post on a few sites and they all are saying the same thing. Just start the computer with the disc in the drive and it will wipe it but its not registering the discs until it finishes loading and I am looking at my desktop.