HDD with more than one child

[Christian]

The VM is a win7 x64 and the guest also. Several time when using it and after some tests in the guest i switch it off (like power switch). After this a retun to the last snapshot, so all should be liek before. But sometimes it happens that when i start VB the message came up, that the HDD has moe then one childs. In this case i delete one of them in VM Manager and then in the IDE also the Snapshop (which coukd not be deletetd because of two existing chields).