id summary reporter owner description type status component version resolution keywords cc guest host 8552 Export from 3.2 does not work in 4.0 Ed "I exported a Windows 7 VM from Virtualbox 3.2.12 on my desktop computer. I then imported the VM in Virtualbox 4.0.4 on my laptop. After importing, Virtualbox says the saved state is unusable, and I discard it. I then try to start Windows. It reaches the ""Starting Windows"" screen, where normally there is a Windows logo that moves. However, the Windows logo never appears, and boot never finishes. If I import the VM using Virtualbox 3.2.12 while keeping everything else the same, the VM works fine. It seems like the VirtualBox kernel module is crashing. I do not get a core file produced, but I am attaching a log from dmesg. If there is a way to get the kernel-level equivalent of a core file, let me know how and I'll do it. " defect closed other VirtualBox 4.0.4 fixed import other other