id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
1503	No VM can be started after upgrade from 1.5.6 to 1.6.0 (Windows XP 32bit host)/AMD-V -> fixed in SVN/1.6.2	Philip		"I was running VirtualBox 1.5.6 on Windows and had three guests: OpenSolaris 2008.05, SXDE 1/08, Ubuntu 7. I could not simply upgrade to 1.6.0 because after running VirtualBox-1.6.0-Win_x86 I received a error message ""You have to uninstall VirtualBox 1.5.6 first"". I did; then Installed VirtualBox 1.6.0, then run it. It seemed to import all guest VMs, asking what to do with them (Cancel, Save, Backup). I choose Backup and found, that no VM can be started, in spite of all of them seem to be imported correctly.

""Cannot be started"" means that after a start a VM does not boot, keeping blank VM window for infinite time. The only way to switch it off - power off the VM. VirtualBox itself looks fine and responds quickly. "	defect	closed	other	VirtualBox 1.6.0	fixed	upgrade		other	other