yes, the .vhd-file is the primary disk
When I start the VM, I get a Windows boot error :
File: \Windows\system32\winload.exe
Status: 0xc000035a
Info: Attempting to load a 64-bit application, however this CPU is not compatible with 64-bit mode.
When I boot this VM from a Windows 7 (64-bit) ISO (to try the Windows repair functionality), I get the same message - I don't have this problem when I create a new VM from scratch using this ISO-file.
The host machine has a Intel i3 2350 CPU which is running Windows 7 Ultimate 64-bit , although I think that hardware visualization support is currently disabled, but even without it all my other Windows 7 VMs run flawlessly.