Virtual PC: Performance Issues on Notebook, Mini-PC etc.

Power management may slow down virtual PC. I found a solution that works perfectly on my Notebook:
http://svengillis.blogspot.com/2008/01/performance-issues-with-virtual-pc-on.html

Essentialy I had to change the enable_idle_thread setting in the options file located at
C:\Users\[My User Name]\AppData\Local\Microsoft\Windows Virtual PC in my windows machine.