Ever since I upsized my HDD NX turned into an ABSOLUTE dog. It was never a speed demon, but it was always acceptably crappy. I lived with it because I like the capabilities it gives me, non-destructive and instantly reversible editing and all, not to mention the fact that until recently as a pure converter it blew away all the competition. I read here and there about people's claims that theirs was unacceptable and thought it was all an exaggeration. However, recently I bought a bigger and better one, 465 GB 7200 rpm. The old one was around 250 GB and 5200 rpm and I moved it into a secondary bay and use for backup, I also have Win7 installed on it on a separate partition. NX immediately turned into a dog --- 30+ seconds to launch, over a minute to open an image with a moderately complex sequence of edits. The computer is reasonably powerful and up-to-date ---- 2.4 GHz quad core CPU, 4 GB RAM, Vista with all the latest patches. Before you blame it all on Vista, note that NX was OK before I upgraded the HDD, the problem appears to be strongly related to me installing a new HDD. Has anyone experienced that, and how did you deal with it? One possible clue is that there is A LOT of hard disk activity when NX is launching or opening any file, almost as if it is running out of memory and has to rely on VM. Another interesting thing is that NX tends to be just as slow when running under Win7.