Hi guys and galls, Does anybody know of a version of virtualbox that doesnt have that exorbitant cpu usage problem. Vbox version and additions 3.16. I have a Windows XP host and guest. And in the guest with the additions installed my cpu fan races like mad. I installed speedfan on my host, with max temp at 68 degrees celcius. The MS VPC2007 sp1 is much milder, with simular software installs as I have in vbox. Cheers.