Hi I am using Parallels 3 latest build. I use Office 2007 and am using MS exchange server. At times the Parallels is using up to and over 100% CPU and the fan is going crazy. I just upgraded to a 3 GB memory so that should not be a problem. What can be using up so much CPU? I am not using any other programs at the time. Using Mac OS 10.4.10 and Mac Book Pro C2D with 3 gb mem and 2.33CPU. Any answers would be great. -Hilmar