I just finished doing a cleaning of my nephews computer.He has a Dell Dimensions 2400 with Pentium 4, 256MB memory and a 80GB hard drive. He is running windows xp home edition. We opened up the tower to clean out all the dust using air cans. We were very careful not to touch any wiring or connections to the CD roms or hard drive. We were ready to install 256MB chip more of memory to make it 512MB. However he purchased the wrong chip so we did not install it. I did remove the memory stick it had to show him what to purchase. I then made sure we reinstalled it back properly and tightly. We also installed tune up 2006 and Norton system works to clean out his system. I had tested the cd roms and they seemed to be working. Then my nephew tried to install his I-pod software and the program did not open itself. He then went to my computer to open the software manually and realized that the d:/drive and the e:/drives were not showing. I tried updating the drivers with no luck. My next step was to delete the cd rom's in device manager and reboot the sysytem. The system recognized the hardware and installed the drivers but the cd roms still do not appear in My Computer. Any suggestions would be greatly appreciated. BTW I also tried to do a system restore to an earlier date but windows xp could not restore to an earlier date.