Datto Endpoint Backup for PCs: Windows Agent Release Notes

Topic

This article contains all the software release notes for Datto Endpoint Backup for PCs. The latest updates appear first.

For more information about the Datto Endpoint Backup for PCs solution, see Getting Started.

Environment

  • Datto Endpoint Backup for PCs

Description

  • Releases consist of agent updates.
  • For information on updates to the cloud, refer to: Cloud Release Notes.
  • Datto pushes updates out on a rolling basis. You may not be updated immediately upon each new release. Update windows will vary, but are generally completed within one to two weeks of the initial release date.
  • When new releases become available, they are automatically pushed out and require no partner intervention unless otherwise noted.

Index

2025

2024

2023

Releases

Agent Version 3.0.30.1 - May 23, 2025

Bug Fixes:

  • Datto Agent Tooltip for Paused Backup: Resolved an issue where the Agent tray tooltip did not display the estimated pause duration after backups were paused from the portal.
  • Agent Uninstaller Removing All Contents in C:\Program Files\Datto: Fixed a critical bug causing the Datto Agent uninstaller to remove the entire C:\Program Files\Datto directory, affecting other Datto programs. The uninstaller now only removes DWA-related files.
  • Datto Agent Installation on Unsupported OSes: Added OS validation to block installation on unsupported operating systems (e.g., Windows 7 x64), ensuring compatibility with official requirements.
  • Enhanced Agent State Display in Datto Agent Tray App: Improved how backup speed and status are displayed, preventing scientific notation for speeds, reducing erratic speed jumps, increasing update frequency, and adding a “Reboot Recommended” status.
  • Added cURL Timeouts to Prevent Random Failures: Implemented timeouts for all cURL requests (not just GET) in CurlHelper.cpp to avoid hanging connections and random agent failures.
  • Tray Icon Missing After Datto Agent Installation: Fixed an issue preventing the tray icon from appearing until after a reboot. The icon now displays immediately upon installation completion.
  • Increased Default Datto Agent Connection Timeout: Raised the default server connection timeout to 1800 seconds (from 900) to reduce backup failures in slower network environments.
  • Datto Agent with Bandwidth Usage Set to 0: Resolved a problem where setting both “Idle Limit” and “In Use Limit” to 0 blocked cloud connections indefinitely. The agent now enforces a safe minimum bandwidth.
  • Deadlock When ‘In Use’ Bandwidth Throttling is 0: Addressed a deadlock condition that halted backups if the ‘In Use’ throttle was set to zero, ensuring uninterrupted backup progress.
  • Agent Installer Rollback Breaking Windows Boot: Fixed a rollback issue that could leave driver settings in an inconsistent state, preventing Windows from booting. Rollback now preserves driver integrity.
  • Unexpected Throttling Behavior: Corrected throttling logic to prevent backups from running significantly slower than the configured bandwidth on slower connections.
  • Driver Marked for Deletion After Update Rollback: Improved driver installation logic so the same driver version is not reinstalled unnecessarily, avoiding rollbacks that could remove critical drivers and lead to BSODs.

Agent Version 3.0.19.12 - June 26, 2024

Bug Fixes

  • Agent Interaction with "Partially Loaded" Driver: Fixed an issue where the agent failed to back up due to interacting with a "partially loaded" driver.

Agent Version 3.0.19.9 - June 4, 2024

NOTE  A manual agent update will need to be performed, before the automatic agent update process will resume. For more information please refer to: Manual Update Required for Datto Windows Agents

Bug Fixes

  • Snapshot Handling: Fixed an issue causing missed file system changes and corrupted backups due to simultaneous creation of shadow copies by other software. Our agent now handles these situations better, ensuring reliable backups.

Agent Version 3.0.19.1 - April 3, 2024

Bug Fixes

  • Blue Screen Prevention: Resolved an issue that could cause a Blue Screen showing 'Inaccessible Boot Device' error. Agent logic has been updated to monitor the state of the cbtfilter driver. If the filter driver has been blocked, all backups will run as a diffmerge until the installation is completed successfully and the system is rebooted. Please make the recommended adjustments in your AV/EDR solution as detailed here.
  • Backup Timeout Fix: Fixed an issue where Endpoint Backup agents could time out prematurely during backup finalization, leading to failed backups.
  • Restore Point Reliability: Addressed a problem in Endpoint Backup Agents that could result in unrecoverable restore points and bluescreens during screenshot verification. To ensure backup integrity, impacted assets may promote the next backup to a diffmerge to maintain data consistency after this update.

Agent Version 3.0.17.5 - July 17, 2023

Bug Fix

  • Addressed an issue with French OS pairings
  • Addressed backup integrity issue.

Agent Version 3.0.17.3 - June 23, 2023

New Features

  • Datto Endpoint Backup with Disaster Recovery: This release supports the launch of our new product, Endpoint Backup for Servers. Additional information is available at datto.com

Improvements

  • Additional Log Level Configuration: Enhanced customization options in log-level configurations.
  • Automation for Changed Hostname: Hostname changes are now automated, reducing manual intervention.
  • Optimized Connection Timeouts: Improved connection timeout handling for enhanced performance.
  • Optimized Shadow Copy Calls: Streamlined shadow copy calls for a more efficient experience.
  • Updated Registration Page Links: Updated registration page links for new installations.
  • Optimized Yield Points: Yield points have been refined to ensure successful backups amidst multiple interruptions.
  • Security Updates: Boosted your protection with the latest security enhancements.

Bug Fixes

  • Pairing Info Storage and Restore: Resolved issues regarding pairing info storage and restore functionalities.
  • UUID Change Issue: Addressed the issue that affected UUID changes when upgrading from the 1.23 legacy agent to 2. x.
  • Detect and Exclude Hardlinks: Fixed issues with the detection and exclusion of hard links.
  • Prevent Agent Crash with ADS: The bug that led to agent crashes with certain alternative data streams (ADS) has been fixed.
  • Block Range Exclusions: Resolved issues with block range exclusions.
  • Agent Backup Status Changes in the API: Issues affecting the agent backup status in the API have been rectified.
  • Curl Error: We've addressed the Curl error related to writing response bodies.
  • Windows Versions Extents Buffer: Fixed the bug where Windows versions extents could read past a buffer.
  • Restore of Multi-Volume Assets: The issue where the agent could fail to restore multi-volume assets in some cases has been resolved.
  • VSS Writers Addition: Fixed the bug where VSS writers failed to be added in some cases.