I am running win98se with intel celeron.When I turn on the computer it loads everything okay and lists my cd rom and cd r but when I try to use either of these it does not recognize the drives.If I go into my system properties it doesn't list a cd rom at all.They worked fine the other day.I downloaded Norton Systemworks and it said I was using 100% of my memory so I deleted a few things but I am sure I didn't delete anything to do with these drives.They were programs that I deleted.