I just unfortunately installed a yamaha cd burner that came with Nero software. I already had a somewhat earlier version that I had bought a serial number to. The yamaha disk basically has made my registered version non functional. The nero yamaha program will only burn on the yamaha drive not on my regular cd-rw. I was told that for $15 I can get some kind of patch from Nero for the yamaha software. I'd just like to go back to my original program which was set to work on any number of drives