What user rights and permissions are essential for a service account to prevent "Error 1069"?

The primary user right required to prevent Error 1069 for a service account is "Log on as a service." Without this right, even with correct credentials, the service cannot authenticate and start. This right is typically granted via Local Security Policy (secpol.msc) or Group Policy (gpmc.msc) under `Computer Configuration\Policies\Windows Settings\Security Settings\Local Policies\User Rights Assignment`. While not directly related to Error 1069 itself, the service account will also need appropriate file system, registry, and network share permissions to access resources required by the application it runs. Error 1069 specifically refers to the *logon* failure, not subsequent resource access failures.