Ok I don`t Know what am I doing wrong, but since I bought this DVD Burner (LG GSA-4160B A302) I have become an expert coaster creator, I have tried with Princo and TDK DVD-R 4X ID(TTG01) and with the brand on the disc, and only one of the burned TDK was ok (tried with six), finally I tried to burn the last disk to 2x but at the 90% nero displayed and error of "cannot focus" or "error focus alingment" or something like that, The main problem in not while burning, but when checking the media with nero CD/DVD Speed it display a read error while testing, and of course if I try to rip the copied DVDs it is impossible because read errors or ciclic redundance errors. Note that I am burning images stored in the HD. I was thinking in the following possibilitys as the source of the problem: 1. Hard disk fragmentation was critical at the time of burning the DVDs. 2. I have installed in my system DVDXGhost running in the background and that is causing read/write errors. 3. I did a Firmware upgrade from (A300) to (A302) and the last version of the firmware is buggy. 4. Maybe some evil force from the underworld is trying to keep my cursing to condemn my sould. Spyware, virus or Adware problem discardted since the PC is not connected to the internet, but I have run Spybot, Adaware and norton 2004 anyway.