Skip to main content
Acronis True Image 2021
Acronis Disk Director 12 Home
Acronis Revive 2019
Acronis Cyber Protect 15
Acronis Cyber Backup 12.5
Acronis Snap Deploy 5
Acronis Disk Director 12.5
Acronis Cyber Files
Acronis Files Connect (formerly ExtremeZ-IP)
Acronis Cloud Manager (formerly 5nine Cloud Manager)
Acronis Cloud Migration (formerly 5nine Cloud Migration)
Acronis Cloud Security (formerly 5nine Cloud Security)
Acronis Manager Standard (formerly 5nine Manager Standard)
Acronis DeviceLock DLP
Acronis Cyber Protect Cloud
Acronis Cyber Backup Cloud
Acronis Cyber Disaster Recovery Cloud
Acronis Disaster Recovery Service (formerly nScaled DRaaS)
Acronis Cyber Files Cloud
Acronis Cyber Infrastructure
Acronis Cyber Appliance
Acronis Backup Advanced for vCloud
Acronis Developer Tools
Acronis Ransomware Protection
Acronis Monitoring Service
Acronis Storage Gateway
Acronis Backup 12
Acronis Backup 11.7
Acronis Disk Director 11 Advanced
Acronis Backup for VMware 9
Acronis Backup Service
Acronis Backup 11.5
Acronis Backup and Recovery 11
Acronis Backup and Recovery 10
Acronis True Image 2020
Acronis True Image 2019
Acronis True Image 2018
Acronis True Image 2017
Acronis True Image 2016
Acronis True Image 2015
Acronis True Image 2014
True Image 2013 by Acronis
True Image Lite 2013 by Acronis
Acronis True Image Home 2012
Acronis True Image Home 2011
Acronis True Image Home 2010
Acronis True Image Home 2009
Acronis True Image 11 Home
Acronis True Image Home 10.0
Acronis True Image 9.0 Home
Acronis True Image 8.0 Home
Acronis Disk Director 11 Home
Acronis Disk Director 10.0
Acronis Revive 2017
Acronis vmProtect 8
Acronis Recovery for Microsoft Exchange / for MS SQL Server
Acronis True Image Echo / 9.1
Acronis Snap Deploy 4
Acronis Snap Deploy 3
activeEcho & mobilEcho
Acronis True Image Small Office
Acronis Small Office: Cloud Server Backup
Acronis Backup and Security 2011 / 2010
Acronis Antivirus 2010
Acronis Internet Security Suite 2010
Acronis Migrate Easy 7.0
Acronis Drive Cleanser 6.0
Acronis Drive Monitor
Acronis Backup 12
Technical Questions & Known Solutions
Acronis product fails to back up a VMware virtual machine with "Creating a quiesced snapshot failed" or "An error occurred while quiescing the virtual machine"
Acronis Bootable Media Does Not Detect HDD, RAID or NIC
Acronis software: NVMe drives in RAID mode are not detected by Linux-based bootable media and Acronis startup recovery manager
Acronis Software: Installation fails with "MainEngineThread is returning 1603" or "MainEngineThread is returning 1618"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Backup Fails with ''Not enough space to create a volume snapshot on the volume where the snapshot storage is located"
"Backup/Activity is not responding" alert
"Backup did not start" alert
Acronis Cyber Protect Cloud, Acronis Cyber Backup: backup fails with "VSS writer 'SqlServerWriter' with class ID 'A65FAA63-5EA8-4EBC-9DBD-A0C4DB26912A' has failed to process the snapshot"
Acronis Cyber Backup Software: "Failed to create volume snapshot"
Acronis Backup: Corrupted MFT, Run List, Block Bitmap or Index forces sector-by-bector backup mode
Acronis Products: Installation Fails with "An error occurred during the installation of assembly" "Microsoft.VC80.CRT,publicKeyToken"
Acronis Cyber Protect, Acronis Cyber Backup: How to Restore Files and Folders from Cloud (Web Restore)
"Backup finished with warning", "Activity finished with warning", "Activity failed" alerts
Acronis Backup 12: Backup Fails with "Logon failure: unknown user name or bad password"
Acronis Cyber Backup: Backup fails with "Access to the file is denied"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: backup fails with 'The shadow copy provider had an unexpected error while trying to process the specified operation'
Acronis Cyber Protect Cloud, Acronis Cyber Backup: backup fails with "CRC error" or "Failed to read the snapshot"
Acronis software creates a temporary file during snapshot
Acronis software: *.OST-file is not backed up
Acronis Cyber Backup: backup fails with "The operation has timed out"
Acronis Backup Software: BSoD after Restore to New Hardware with "Stop 0x0000007B" Due to Missing Drivers
Acronis business backup solutions and Acronis True Image Cannot Be Installed on the Same Machine
Acronis Cyber Protect, Acronis Cyber Backup: all or some VMware virtual machines do not appear in the console
Acronis Cyber Backup: "Machine is offline for more than X days" alert
Acronis products: Installation log shows message "Failed to grab execution mutex. System error 258."
Acronis Cyber Protect: Application-aware backup fails with "Failed to get the metadata from the 'VMware Snapshot Provider' extension library" or "VSS metadata is missing or corrupt"
Acronis Backup Advanced for Exchange: Backup, Restore, Or Browse Fails with Errors
First cloud backup is slow
Acronis Products: After uninstalling Acronis product the entry in software list remains.
Acronis Cyber Protect Cloud, Acronis Cyber Backup: "Backup plan is canceled" alert or "The operation is canceled by the user" warning
Acronis Cyber Backup: Disk Backup with Acronis VSS Provider Fails on Windows SBS and domain controllers
Acronis Cyber Backup: Backup Fails with "Cannot back up virtual machines of the ESX/ESXi server because the "vStorage APIs" feature is not installed on the server"
Acronis products: backup to cloud fails with "Failed to resolve hostname"
Acronis Backup Software Creates Large Incremental or Differential Backup Archives
Acronis Software: Upgrade or Installation Leads to "Fatal Error During Installation"
Acronis Cyber Backup: "There hasn't been a successful backup for more than X days" alert
Acronis Cyber Backup Advanced: Adding a Machine to Acronis Management Server Errors Out with "Failed to add machine to the management server"
Acronis Cyber Backup: Backup Fails with 'The semaphore timeout period has expired'
"Backup is corrupted" alert
Acronis Cyber Backup: "Active Protection service not working" alert
Acronis Cyber Backup: installation on ARM-powered PC fails with "This app can't run on your PC"
Acronis Cyber Backup: backup completes with warning "Link target was not backed up" or "The file is out of backup scope"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: manual registration of backup agent fails with “Failed to encrypt data. The system cannot find the file specified”.
Acronis Cyber Backup: Recovery of an Exchange database fails with "It is not allowed to overwrite database during recovery"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Hyper-V Virtual Machines are Unavailable during Snapshot Creation
Acronis software: operation Fails with "The activity state has been repaired after unexpected failure"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Backup Fails with "All items specified for backup do not exist." or "None of the items selected for backup were found."
"Subscription license will expire soon/expired" alerts
Acronis Cyber Backup 12.5: Execution of the .exe installation file must be explicitly allowed due to security settings
Acronis Cyber Backup: logging in to the backup console fails for a user without a password
"Backup status is unknown" alert
Acronis Backup 12: "Functionality is not available under the assigned license" error
Acronis Backup: activating a cloud subscription fails with "License key is not valid" or "Account does not have available subscription"
Acronis Backup 12: backup of virtual machines fails with "The management server is not available for more than 30 days"
Acronis Cyber Backup: operations with a virtual machine fail with "NBD_ERR_NETWORK_CONNECT"
Acronis Virtualization: Backup of Virtual Machine Fails with "Failed to open the virtual machine"
Acronis Cyber Backup: "Quota almost reached" alert
Acronis Cyber Backup: mms.exe or ams_web_service.exe crashes on Windows 10 Creators Update (build 1703)
Acronis Cyber Backup: recovery of a Windows Server 2008 hangs at 88%
Acronis Cyber Backup: Hyper-V replica VMs have inconsistent state after recovery
"Validation failed" alert
Acronis Cyber Backup: warning during restore "A required privilege is not held by the client"
Acronis Backup 12: email notifications are not sent after reinstallation of Acronis Management Server
Acronis Cyber Backup Advanced for Exchange: "The Exchange server has responded that the mailbox quota is exceeded"
Acronis Backup 12: Adding Local Machine to Management Server Fails during Upgrade from Acronis Backup 11.7
Acronis backup products: Slow detection of some USB drives
Acronis Products: installation fails on Windows Server SBS 2003 or Windows XP
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Hyper-V virtual machine backup fails with "Failed to obtain associated virtual system settings"
Acronis Cyber Backup: "Backup is waiting" alert
Acronis Backup 12: disk-level backup under bootable media to an USB drive fails