KB1094: Veeam vPower NFS Service fails to start
https://www.veeam.com/kb109420.07.2011 · In versions of Veeam Backup & Replication prior to 10 (10.0.0.4461), the Veeam vPower NFS Service will fail to start if the RootFolder value in the registry contains a path that is not valid.Starting with Veeam Backup & Replication 10, if the RootFolder path value is invalid, the software will automatically default to C:\ProgramData\Veeam\Backup\NfsDatastore.
KB1059: Veeam Service Fails to Start with Error 1920
https://www.veeam.com/kb105919.07.2011 · Collect Veeam Logs. If the Veeam Backup & Replication Console is accessible, use the built-in log collection tool to gather logs from the server where the service is failing to start.; If the Veeam Backup & Replication Console is inaccessible, manually collect the service logs from C:\ProgramData\Veeam\Backup on the server where the service is failing to start.