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Trying to install WAN Accelerator and it fails with the following message?

Error message “Installing package VeeamWANSvc_x64.msi Error: Error 1920. Service Veeam WAN Accelerator Service (VeeamWANSvc) failed to start. Verify that you have sufficient privileges to start system services.” appears when trying to add a WAN Accelerator in the Backup Infrastructure. Trying to install the service manually on the proxy also fails.

veeam_WAN1

Cause

The service installer is pointing to an invalid path in the Registry on the server. This occurs most often when the role is removed from the server, then the original drive used for the WAN Accelerator cache was removed.

Solution

On the WAN Accelerator server having an issue reinstalling, open regedit and browse down to the following location:

HKLM>Software>Veeam>Veeam WAN Accelerator

Find the following Registry Strings and modify to point to a valid directory path:

HashRepositoryBasePath 
HashRepositoryGlobalDedupBasePath 
WanRootCachePath 

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