My 3550A went from burning DVD-R / DVD+R, (Verbatim and Taiyo Yuden), 16x media in 6 minutes, to taking over 30 minutes to complete.
Its not the media, something else is going on.
When I burn, the hard drive and green light on the front of the DVD burner flash on and off about once per second.
I bring up task manager, and I don't see any other application running.
Lots of processes, but non are consuming cpu or memory.
The only thing I have done recently is install Zone Alarm, and yes, I have temporarily disabled it, but burns are still 30+ minutes per attempt.
I'm using Liggy and Dee's latest firmware, (and have been for months).