id summary reporter owner description type status component version resolution keywords cc guest host 8532 problem in 4.0.4 with VHD image - image will not boot => Fixed in SVN Paul Smith "I was on 3.2.12 and happlily running a VM with W2K3 which was originally created as a VHD with Virtual PC for Windows7. All was good. I then upgraded to 4.0.4 and now when I try to start the VM I just get a black screen. I do not get any disk activity at all. I tried all of the usual tweaking of the settings just in case 4.0.4 had a default setting that was different to 3.2.12 but nothing worked. I then used CloneVDI to migrate the VHD file to a VDI file. Set all of the settings back to the way they were before I upgraded (i.e. virtualization, CPU's, IO APIC etc) and it booted first time - no problem. Just to be sure I detached the VDI and reattached the VHD and got the black screen again with no activity whatsoever on the disk. I think there is an issue with the upgrade to 4.0.4 or a compatability issue with VHD that is not there in 3.x. Something gets screwed when its a VHD of a certain type. " defect closed virtual disk VirtualBox 4.0.4 fixed "4.0.4 vhd ""black screen"" upgrade" Windows Windows