Operating system error 5(error not found) encountered.
Application Log in the Event Viewer shows :
Log Name: Application
Event ID: 17053
Task Category: (2)
UpdateUptimeRegKey: Operating system error 5(error not found) encountered.
Net helpmsg 5 shows Access is denied.
Make sure the Backup Exec Service Account (BESA) has required priveldges. Once the privledges are granted the service should start fine.
To confirm the BESA has all the required rights please refer to the below technote :