Take your cd and check it on a different computer, if you're using USB reformat it and recreate the USB disk. Try to install it again, and be sure TO WIPE YOU DRIVE. READ: REFORMAT. Pick custom install, you WILL loose ALL your FILES, so PLEASE BACKUP lol, can't stress that enough!! Now, pay attention to the installation. If anything fails, check around for error codes, and write them down. Windows 8 should install on ANY pc that meets it's requirements, not on a pc specified by dell.