SharePoint with multiple WFE servers

When starting protection of a SharePoint farm with multiple Web Front-End (WFE) servers, you need to perform additional step.
When you run the ConfigureSharePoint –EnableSharePointProtection command you might receive the following error in a environment with more then one WFE server.

Cannot start service SPWriter on computer '.'. An error occurred while trying to start the Sharepoint Vss Writer.

In this case you first need to run the command:
C:\program Files\Common Files\Microsoft Shared\Web Server extensions\12\bin\Stsadm.exe -o registerwsswriter

Note: The administrator credentials you provide for the Windows SharePoint Services farm must be a local administrator on the WFE server

More info: TechNet forum