Error in Hyper-V VMs at startup after installation of Backup software

Once the server has started, the VMs are not initiated.

Error displayed:

SV04-300x277

Error: 0x8007001F

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

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