On Wed, 2007-11-28 at 10:55 -0500, Darren Blaber wrote:
  

dows is idle, using 1-2% cpu, the kvm process  uses
about 20-30% cpu. Whenever I am doing any kind of activity (especially
disk activity) its shoots right up to 99%.  Anyway, have a readprofile
snap shot as well as kvm st
    

what windows are you using?
is it with acpi?
your host is 32bits or 64bits?