BackupAssist Classic v15

BackupAssist Classic v15.0.1

Maintenance released February 17th, 2026

Cloud Backup

  • Detect and suggest the use of immutable option for Cloud Backups when the container has immutability configured
  • Immutability - fix bug which doesn't extend the lock as needed on data for files that haven't changed
  • Fixed performance issue where for some jobs the incremental backup ignores the existence of previous backups during processing (though data is not reuploaded if it already exists)
  • Add support for Impossible Cloud and other providers that do not support the get-acl-bucket command
  • Add support for iDrive E2 non-immutable containers with "Default Encryption" enabled
  • Allow periods (full stops) within AWS bucket names
  • Add support for QNAP QuObjects and other providers that do not support the ListObjectVersions API
  • Fixed an issue for immutable jobs to Azure where incremental backups can fail with error: “BA7000 Cloud backup incorrect password” due to unexpected data in the response from Azure
  • Fixed a restore issue for iDrive E2 immutable backups when all objects are in “deleted” state (previously unexpected error response)

Other fixes

  • Prevented unnecessary extra files from being generated in the Windows MachineKeys directory
  • Fixed a rare issue where the console UI can hang when it remains opened for a few days
  • Fixed a rare hang when running a Test Restore job
  • Fixed a rare issue where file restore can fail for some specific files with error “Path not found in backup"

VM Instant Boot

  • Fixed processing for backups on mapped network paths
  • Added cancellation support for the "Create Instant Boot" function in the VM Instant Boot UI
  • Improved some minor issues in the UI

Other UI changes

  • Fixed broken default and "Start time" sorting on the Reports page
  • Improvements to the left hand navigation in the UI, more consistency with capitalisation
  • Improve UI flow consistency in the New backup and New test restore sequences
  • Fixed some inconsistencies in the selections UI behavior, including regarding the use of checkboxes, VSS warning display, and the VSS mode options
  • The temporary encrypted volume created by a running System Protection job is now hidden from the selection screen
  • Fixed bug where the last completed job result is sometimes not shown for a job in the "Last 5 backups" item at the bottom of the Job list / Overview

BackupAssist Classic v15.0.0

Released November 6th, 2025

NEW Cloud Immutability

  • Immutable backups in the cloud (WORM).
  • The best offsite backup protection from accidental and malicious corruption.
  • Backups are locked for the user-specified retention period and then removed.
  • BackupAssist manages the cloud object retention period, so no additional cloud storage cost will be incurred by enabling immutability.
  • Seamless discovery and restore from backups, even when the cloud bucket/container data appears to have been corrupted.
  • Supports:
    • Object Lock on AWS S3 and S3-compatible providers.
    • Immutable Storage on Azure.

NEW All New user experience

  • Intuitive first-time user experience
  • Streamlined operation for existing users
  • Improved feature discovery and navigation
  • Simplified job creation

NEW VM Instant Boot UI

  • Quickly get your backed-up system up and running as a Hyper-V guest, using this new UI to create and manage the boot files that are needed.
  • The virtual disks created by the VM Instant Boot UI application can be immediately attached to a new Hyper-V guest and started. This process with will not affect the underlying backup, keeping its integrity intact.
  • Works with both local system / volume backups as well as downloaded system backups from a cloud storage.

Improved Cloud stability and performance

  • Automatic request rate management enabled by default for new cloud jobs
  • Reduce rates based on provider requests and errors
  • Increase rates again when conditions are suitable
  • User-configurable limits on request rates
  • Improved stability and consistent performance

Improved Advanced imaging engine

  • Added cancellation support to the NTFS optimization backup stage (0% on incremental backup)
  • Fixed a bug in the low-level NTFS optimization routine where NTFS errors on a volume caused it to hang at 0%.
  • Fixed a hang in the low-level NTFS optimization routine which can happen when the destination is not reachable

Cloud Backup:

  • Fixed backup of files that were being skipped due to having a zero-size backup stream (skipped file warnings)

  • Provider S3 API requests are identified as “app/CortexIT-<info>”

Other enhancements:

  • Backups: Fixed regression which prevented concurrent job execution (zip) or multiple different jobs from being backed up/restored simultaneously
  • Restores: Streamlined entry of the encryption password during restores
  • Scanning: Updated the 7zip library to fix bugs and improve detection routines
  • Settings Export/Import: fixed issues related to exporting and importing encrypted jobs
  • UI: Improved product differentiation for BackupAssist Desktop vs Classic
  • UI: Added “days of week” to run backups into the job creation wizard
  • Licensing: Fixed missing license expiry warnings for BackupAssist Desktop (via product key)
  • Licensing: Improved workstation OS detection routines to handle some OS corruptions

Feature removal:

  • WebDAV (not recommended) is no longer available by default
  • Deprecated cloud seeding functionality and the “quick” job wizard
  • Deprecated Exchange Granular Restore (EOL)