I tried to use this program for the first time yesterday. Confession: my computer is a four-year old Dell 8200 using a Pentium 4 processor operating at 2.3 Ghz with Windows XP. (Yes I know, it's time to up-grade!) I've bench-tested this computer for PSCS2 performance and it is absolutely par for the course in its class. It handles PSCS2 and the usual essential plug-ins (PK Sharpener, Noise Ninja) OK for its class - not a speed demon, but tolerable and stable. So far the only programs I've used that occasionally cause it to hang are Adobe Bridge and Lightroom for Windows - Lightroom more so than Bridge. It takes forever to do anything in Lightroom on this computer (even slower than Bridge), so until I up-grade the computer, I shall not be using Lightroom. I'm not blaming Lightroom, just observing something a four-year gap between hardware and software really reveals: that whether optimized or not, new generations of software will severly challenge older generations of hardware, and an after-thought: perhaps the hardware need not be as relatively "old" as mine for these issues to begin to appear.