I'm trying to get a feel for how big of an issue Parallels unusually high CPU usage is. I have Parallels running on 2 computers... one is a MacBook DuoCore 1.8Ghz with 2GB RAM, the other is a Hackintosh Pentium D 2.8Ghz with 3GB RAM. My Hackintosh has no CPU usage issues at all. Parallels works beautifully. The MacBook is a different story. When Parallels is running, the CPU is running at 80-90% and the fans are going non-stop. The minute I pause or shutdown Parallels...everything is back to normal. In my Windows XP VM, the CPU usage is around 5%. I've had this problem with every version of Parallels. I'm currently at RC2. I haven't seem much in the forums about this.. so I fear it's an isolated issue that will be hard to figure out. How many people here have CPU usage issues?