Xolox runs at 85-95% almost all of the time anymore. I've reinstalled 1.32 and 1.4beta several times. My HD also "thrashes" whenever I'm running it, like the other guy mentioned. I'm running a PIII 450, 256mb, 80gig HD, XP Pro. I've left the machine running overnight before, come back and it's still running at nearly 100% on Xolox alone. The computer isn't frozen, but is unusable until I completely close out Xolox, typically by halting the process.