Once the server has started, the VMs are not initiated.
According to Microsoft, this is the explanation:
It is a timing issue with FSDepends.sys and VHDMP.sys . This timing issue occurs when certain programs backup (backup software) installed on computers that are running Windows Server 2008. By default, the value of early FSDepends.sys the register is set to Manual . When any software backup third party carries its driver tape device, the software sometimes can result in FSDepends.sys and VHDMP.sys not initialize correctly.
How to fix follow these steps :
1) Start the Registry Editor.
2) Go to the following registry key: ” HKLM \ SYSTEM \ CurrentControlSet \ Services \ FsDepends ”
3) Under the key ” FsDepends “, change the value REG_DWORD “Start” to “3” to ” 0 ”
4) Restart the computer
NOTE: In most cases you must also disable the tape drive in Windows, restart the OS and after restarting VMs, enabling the unit if necessary.
The following Microsoft link: http://support.microsoft.com/kb/2013544