Veeam Support Knowledge Base
Failed to perform Veeam VSS freeze: guest OS 'otherGuest' is not supported

Failed to perform Veeam VSS freeze: guest OS 'otherGuest' is not supported

KB ID:	1062
Product:	Veeam Backup & Replication
Version:	5.X
Published:	2011-07-19
Last Modified:	2020-08-13

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Challenge

When backing up a Windows server, VSS fails.

You receive the following error when backing up a Windows Server:

Indexing guest file system Failed to perform index: guest OS 'otherGuest' is not supported

Freezing guest operating system Failed to perform Veeam VSS freeze: guest OS 'otherGuest' is not supported

Cause

VMware tools do not recognize guest OS and mark it as OtherGuest.

Solution

To address, use Registry Editor and add the following entry:

HKLM\SOFTWARE\VeeaM\Veeam Backup and Replication\ VssOtherGuest DWORD = 1

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