I have a 4x cdrw and it's worked fine with nero (for burning cds), the problem is that I can't use any other burning software, i get aspi manager errors. I tried to install windvd (also have a 6x toshiba dvd) and it gives me the same error. I downloaded aspi manager v4.60 from adaptec and no luck, in fact w2k crapped out on me and I had boot from last known good profile.. please help me out if you've run across this before