I have TDK and Aopen cdrw drives which are functioning normal according to the device manager under WinXP Pro SP1. Until a few months ago, they ran normally. Then they would only recognize media (commerical or cdr) only after running Nero first. This was a pain to do, but it worked. Now, except right after rebooting, neither drive recognizes any media, even after running Nero. I tried to uninstall both drives and rescan for new hardware and even uninstalled and installed my IDE controller with no change. I have the most recent ASPI driver.