Sorry for the brief explanation. I started the computer and clicked on F2. Under system I went to boot sequence. There were 6 items listed. 1 Onboard or USB CD-ROM drive. 2 Onboard SATA hard drive. 3 onboard USB floppy drive. 4 Onboard PATA hard drive. 5 onboard network controller and 6 USB device. 2,4 and 5 were not present. Since I have a USB hard drive I went to drives and it listed diskette drive SATA-0, SATA-1, SATA-2, SATA-3, PATA-0, PATA-1 and smart reporting. I looked at the cord from the hard drive to the mother board and saw that it was connected to SATA-1 on the mother board. So I selected SATA-1 and made sure it was on. Then I went back to boot sequence and it said choice 2 was there. I then ran the XP install CD and was able to format the hard drive and install XP. Now when I turn the computer on I get two quick beeps and the lights, which are on the front of the computer, light up 1, 2, 3 steady and 4 flickers but does not stay on. The message on the screen says drive 4 not found: Parallel ATA, PATA-0 {Pri IDE Master} Strike the F1 key to continue, F2 to run the setup utility. If I strike F1 XP loads. I need to find a link for the Ethernet device as I do not have a Dell installation disk