My GSA 4081B drive has recently started giving me the focus/tracking error and toasting discs. I put it another machine, opened and cleaned the laser lens, and updated the firmware. Still get the same problem. I have read some different thread on some other boards I found via google, but nothing that has solved the problem. I read one instance of a UDMA(?) - PIO problem where the hardware setting was being set to PIO. I don't have that issue. The 2 machines I've had it in are: Dell P3 733 384 ram XP pro and MSI P4 3.0 Ghz 1 gig ddr400 ram XP pro Any suggestions besides using a ball peen hammer? edit: after cleaning/machine change to the MSI, one disc burned successfully. Then failures began again. Upgraded firmware and 2 failures at 2x and 4x.