I bought a Sony DRU-510A. It seemed to install without problem, and I was able to use it to load the bundled software. When the computer boots, the drive (set up as secondary master) is recognized by the BIOS, and by Windows. But only initially, once media (I've tried almost everything Data CD, Audio CD, Retail DVD, blank DVD-R, blank CD-R) is inserted into the drive and it is shut, the drive seems to "disappear". It is no longer visible under Windows Explorer, or the Device Manager. I don't know what other information would be relevant, but if anyone can help I would greatly appreciate it! Thank a lot y'all.