SIRIS, ALTO, and NAS: Repairing a Datto Windows Agent Installation (Version 2.1 and Above)



This article describes the process for repairing a damaged or corrupted installation of the Datto Windows Agent software on a protected endpoint.

These steps only apply to Version 2.1 and above of the Datto Windows Agent software.


  • Datto Windows Agent 2.1 and above


The Datto Windows Agent includes built-in self-repair functionality, which lets a device operator run a repair operation on damaged agent installations and resolve issues without needing to fully reinstall the software.

This process requires administrator-level access to, and a reboot of, the protected machine to complete. Datto recommends scheduling a maintenance window and planned downtime for the production system before proceeding.


1. Run the Datto Windows Agent's built-in uninstaller from your Windows Add/Remove Programs or Programs and Features panel.

Figure 1: Datto Windows Agent entry in Programs and Features (click to enlarge)

2. At the Modify Setup screen, click Repair.

Figure 2: Repair (click to enlarge)

3. The repair process will run. When it completes, you will see the Repair Successfully Completed notification. Click Restart to reboot the protected system.

If you do not reboot the protected machine, the Datto Windows Agent cannot finalize the repair process. 

Figure 3: Restart (click to enlarge)

5. After you reboot the production machine, start a backup from the Protect page of your Datto appliance. If you see the error message, "Backup failed due to a problem establishing secure communications with the agent," repair agent communications with your Datto device, and restart the backup.

Was this article helpful?

0 out of 2 found this helpful

You must sign in before voting on this article.

Want to talk about it? Have a feature request?

Head on over to our Datto Community Forum or the Datto Community Online.

For more Business Management resources, see the Datto RMM Online Help and the Autotask PSA Online Help .

Still have questions? Get live help.

Datto Homepage