New dvd writer installed ok and recognised by xp, but device manager shows both the new drive and the old dvd-rom drive. Tried uninstalling the old device then re-booting - the old device reappears, along with the new device. Tried uninstalling both devices, then re-booting, they both appear in device manager. Tried both these things in safe mode - still no joy. Any ideas? Or does it matter? The device does not appear twice in windows explorer.