Error 1920. Service <display_name> (<service_name>) failed to start. Verify that you have sufficient privileges to start system services.
Veeam Support Engineers can review the service logs to help identify why the service won't start.
Each of the Veeam services has its own respective service log file. Often when the service is failing to start for any reason other than permissions, the service will write information that can help with the resolution to its log file.
The service log files are written to C:\ProgramData\Veeam\Backup and have a filename pattern of Svc.<service>.log. You may find it convenient to navigate to that folder, then sort by date modified, then attempt to start the service manually. This will cause the appropriate service log to be easier to identify. Another tip is that after opening the log file, press Ctrl+END to go to the bottom, then begin reading the log from bottom to top, and look for lines containing > Error. Log reading is a skill, one that Veeam Support is trained and ready to assist you with.
This form is only for KB Feedback/Suggestions, if you need help with the software open a support case