Bought a HP dvd740e last tuesday. Installed the firmware revision 42JH, everything seemed to work fine until updated Lightscribe drivers from v.220.127.116.11 to v.18.104.22.168. Now Windows keep messaging that an unknown device has malfunctioned and it need to close it. Guess which is the device which has become unrecognizable by Windows??!!! I've tried a System Recovery to the point before the new driver was installed, but Windows can't restore. How can I uninstall this new driver in order to discard or assert that this is the cause. Also installed Nero v6 on a PC which already had Roxio 7.5. But to the best of my knowledge, the problem began after the lightscribe driver update. However, if I disconnect the power from the driver and reconnect it again, Windows recognizes it until the next shutdown.