Make sure the time is correct and the BIOS sees your CD drive and hard drive.
Boot the machine and hit the required key to enter your BIOS. You want to have keyboard, monitor and mouse only hooked up for an install. Disconnect ALL printers, scanners, speakers, hubs etc. Remove any PCI network cards, sound cards, USB adaptors and modems from the motherboard. Disconnect ALL unneeded devices such as a 2nd CD drive and your floppy drive (if you have one). Remove the power supply plug and open the case.
