It doesn't actually use 100% CPU all of the time. I believe it uses the CPU to the point where the meter can't update fast enough to report less than 100%. For if your machine were tied to 100% CPU ALL OF THE TIME, your mouse cursor wouldn't even hover across the screen, as if the machine had become frozen. Your machine can over heat regardless if you use Palace or not. This is usually a sign that your machine doesn't have sufficent cooling systems - like a fan! Hard drives can over heat for instance, and which case it will stop responding. A hard drive that's mounted that stops responding tends to 'panic' the OS (atleast in Linux).