id summary reporter owner description type status component version resolution keywords cc guest host 2888 Ubuntu Guest On Win XP: CPU Utilization 100% During Network Communications alcohen "I installed VirtualBox 2.1.0, then installed Ubuntu Intrepid from the iso. When updating packages from the repository, after a short while CPU utilization as reported on the host would go to 100%, 99% of which was taken by VirtualBox. Everything would freeze up. After 5-10 minutes or so, CPU utilization would drop back to normal and downloading would resume. I tried several virtual NICs in VirtualBox, none worked better. I dropped back to VirtualBox 2.0.6, repeated the same exercise, and all worked properly." defect closed network VirtualBox 2.1.0 fixed CPU utilization network freeze Linux Windows