id summary reporter owner description type status component version resolution keywords cc guest host 8671 Frequent and random guest resets/lockups when networking enabled travisp "Starting about a week ago, my Windows XP guest has become unusable when network is enabled because it resets or locks up very frequently. This happens regardless of whether I use PCNet II/III or Intel Server network drivers. I have also tried Guest Additions versions 3.1.12, 4.0.2, 4.0.4, and 4.0.5 (r 70636 from a link in the tickets). This is on Ubuntu 10.10 64-bit. It's possible some change has happened on the host that has triggered this. I have tried a complete removal of VirtualBox 4.0.4 and reinstallation. I have also tried restoring the XP Guest from backup from when it was working." defect closed network VirtualBox 4.0.4 fixed Linux Linux