My external LG 2166D (USB only) doesn't want to finish a burn. I've tried 3 burns and it stopped burning at 5, 30 and 8 percent, the drive keeps spinning and everything freezes. My NEC 3550A burns perfectly. I'm using Verbatim +R L/S 8X with XP Pro SP2, (the following are all new ... about a month old) X2 4400+, 1 MB RAM, lots of free space on 300 GB HDD, 1Click DVD Copy Pro and AnyDVD. I believe LG fiirmware (v1.0.1) is current.