I have windows me and reformatted the computer with the disk that HP has. I did use the drive to reformat and it was working a little bit after that. I then installed america online and after that the drive would not work.
Try cycling the install-state:
To do so, (1) Control Panel, (2) System, (3) Hardware, (4) Device Manager, (5) Expand the DVD/CD-ROM Drives entry, right click on thr troublesome drive and uninstall it. Now simply reboot and let Windows try and repair itself.
Now if the CDROM entry isnt there then thats a different problem