If this issue frequently recurs for a specific VM, consider switching from Non-Persistent Runtime Components to Persistent Runtime Components. When using Persistent Runtime Components, the VeeamVSSSupport service is not removed after each job run and is left present within the Guest OS, ready for the next job run.
To enable the use of Persistent Runtime Components:
- Ensure the VeeamVSSSupport service is not stuck marked for deletion. If it is, reboot the VM.
- Enable Use persistent guest agent within the job for that specific VM.
- Manually install the Veeam Installer Service on the VM
The VeeamInstallerSvc.msi is located on the Veeam Backup Server in:
C:\Program Files\Veeam\Backup and Replication\Backup\Packages
With "Use persistent guest agent" enabled in the job and the Veeam Installer Service installed, during the next run of the job, the VeeamVSSSupport service will be created and will not be removed after the job completes.