I have a Gateway PC, bought in 2002, with Windows XP. I've used the CD drive primarily to store our family photographs. A few weeks ago, when I placed a new CD in the drive tray, I didn't hear the normal sound of the thing revving up. The message on the screen told me to place a CD into the drive. I thought maybe the drive was defective and used a Gateway utility called PC Doctor. Following the directions I placed a full CD (again, family photos) into the tray and clicked on the diagnostic icon in PC Doctor. The drive whirred away and ran the following tests: linear seek, random seek, funnel seek, linear read, random read; all were successful. That made me think the drive was working, and maybe the software to run it was not recognizing something. I read a fair number of entries in this forum and tried some without success. I went to the Device Manager, opened "DVD/CD-ROM drives" and found this entry just below it: a yellow dot with an exclamation point in it followed by HL-DT-ST CD/RW GCE-8160B. I right clicked on this, then clicked on "Properties" and was greeted with the following message: "Windows cannot load the device driver for this hardware. The driver may be corrupted or missing (Code 39)." I clicked on "Troubleshoot" and tried to uninstall then reinstall, but as I followed the directions I saw that it told me to insert the CD's that came with the computer. My sense of it was that inserting theCD's would produce the original screen direction to please insert a CD into the drive. I've been back to square one a good number of times now. I hope I've been specific enough in describing the problem so that some of you might be able to suggest a solution. Thanks.