OK, I have a new BenQ 1620 Pro (OEM), slipped it in, set the jumpers, checked it in BIOS, installed a few extra bits of software that came with it, let XP figure it out - all lovely. Burnt a DVD. Fine. When I tried to use a new pile of DVD-R and DVD-RW Nero kept telling me "no disc instered". Now not doing anything, even with a plain old music CD it just opens and shows a blank disc in Explorer - in WMP it wont even open. I've uninstalled everything I can to stop any conflicts, uninstalled the drive and reinstalled it. Next step is to unplug it and the DVD-ROM (same IDE, secondary). Anyone got any ideas otherwise?