> ## Documentation Index > Fetch the complete documentation index at: https://docs.abbyy.com/llms.txt > Use this file to discover all available pages before exploring further. # System requirements for ABBYY FlexiCapture Distributed > Hardware, operating system, browser, and software requirements for ABBYY FlexiCapture servers, stations, web stations, and virtual environments. ## Servers **CPU** * Application Server: 2 GHz or faster with 2 cores * Other servers: 2 GHz or faster **Operating system** * Windows Server 2012 * Windows Server 2012 R2 * Windows Server 2016 * Windows Server 2019 * Windows Server 2022 * Windows Server 2025 To use a localized version of ABBYY FlexiCapture, make sure your operating system supports the corresponding GUI language. **RAM** At least 2 GB for each component. An additional 4 GB of RAM is required if the Database Server is installed. **Disk space** * Application Server: 500 MB for installation * Processing Server: 400 MB for installation * Licensing Server: 100 MB for installation * 2 GB for the SQL Server database * Additional space is required for the file storage **Browser** (to open the Administration and Monitoring Console) * Google Chrome 55 or later (32-bit) * Mozilla Firefox 50 or later (32-bit) * Microsoft Edge 41 or later * Internet Explorer 11 ABBYY FlexiCapture works best with Google Chrome and other Chromium-based browsers. To ensure that Internet Explorer 11 works correctly, install .NET Framework 4.7.2 on the computer with the Application Server, or add the address of an application server to the list of websites that are opened in compatibility mode. **Disclaimer for Internet Explorer users / Known issue** Due to the known limitations of Internet Explorer 11, you may experience issues when processing more than 100 pages or handling numerous verification tasks with ABBYY FlexiCapture. Using Internet Explorer for an extended period can cause the browser to consume a lot of the machine's memory, slow down client performance, and eventually crash. To avoid unwanted interruptions, ABBYY recommends using Microsoft Edge, Google Chrome, or another browser for professional verification tasks. ABBYY FlexiCapture web stations are fully functional in Internet Explorer 11, so use it preferably for ad-hoc processing. Important notes for users of Internet Explorer: 1. In the event of a verification malfunction, the operator cannot resume the task immediately after the session is restored. The task becomes available only after inactive sessions have been purged. By default, inactive sessions are purged every 4 hours. You can change this setting in the `web.config` file on the Processing Server. Purging inactive sessions too often is not recommended; the recommended minimum is 10 minutes. 2. Starting from FlexiCapture R3 Update 1, each new task opens in a new tab to optimize memory use. This also means operators cannot receive new tasks automatically. To revert to the old behavior, open the `web.config` file for the web station and set the `IEVerificationNewWindow` key to `false`. 3. In Internet Explorer 11, users cannot enter Japanese text using the corresponding Microsoft IME. **Other requirements** * The computer where the server is installed must be connected to your domain * Video card and display with a resolution of 1024×768 * Internet Information Services 7 or higher * Microsoft .NET Framework 4.7.2 or higher * Microsoft .NET Runtime 8.0 or later * One of the following databases: Microsoft SQL Server 2016 SP2, 2017, 2019, or 2022; Microsoft Azure; Oracle Database 12c, 18c, or 19c; or PostgreSQL 11 or later * Visual C++ 2015 Redistributable Microsoft SQL Server Native Client 2016 SP1 or later is additionally required for [creating databases](/flexi-capture/admin-guide/create-database). ## Stations **CPU** 2 GHz or faster **Operating system** * Windows 10 * Windows 11 * Windows Server 2012 + Desktop Experience * Windows Server 2012 R2 + Desktop Experience * Windows Server 2016 + Desktop Experience * Windows Server 2019 + Desktop Experience * Windows Server 2022 + Desktop Experience * Windows Server 2025 + Desktop Experience To use a localized version of ABBYY FlexiCapture, make sure your operating system supports the corresponding GUI language. **RAM** * Project Setup Station, Verification Station, Data Verification Station: 2 GB * Processing Station: at least 2.5 GB for each CPU core * Scanning Station: 1 GB **Disk space** * Scanning Station: 1 GB (including 200 MB for installation and sufficient disk space for scanned images) * Other stations: 4 GB (including 2 GB for installation) **Other requirements** * A scanner with TWAIN, WIA, or ISIS support * Video card and display with a resolution of 1024×768 * The computer where the station is installed must be connected to your domain * Microsoft .NET Framework 4.7.2 or later * Microsoft .NET Runtime 8.0 or later * Microsoft Office (version 2007 or later) or LibreOffice (version 4.0 or later) ## HTML5 web stations **CPU** 1.6 GHz or faster **Operating system** * Windows 10 * Windows 11 * Windows Server 2012 + Desktop Experience * Windows Server 2012 R2 + Desktop Experience * Windows Server 2016 + Desktop Experience * Windows Server 2019 + Desktop Experience * Windows Server 2022 + Desktop Experience * Windows Server 2025 + Desktop Experience To use a localized version of ABBYY FlexiCapture, make sure your operating system supports the corresponding GUI language. **RAM** 1 GB **Disk space** * Sufficient space to install a browser * At least 100 MB for program operation * An additional 560 MB is required to install the ABBYY Scanning Plugin for the Web Scanning Station **Browser** * Google Chrome 55 or later (32-bit). Security settings: JavaScript = Allow all sites; Cookies and site data = Allow all sites * Mozilla Firefox 50 or later (32-bit). Security settings: Java scripting = Enable; Firefox will remember history (**Options → Privacy**) * Microsoft Edge 41 or later. Security settings: JavaScript = Allow all sites; Cookies and site data = Allow all sites * Internet Explorer 11. Browser security settings: Internet Explorer medium-high protection level. Required settings: Run ActiveX controls and plugins = Enable; Script ActiveX controls marked safe for scripting = Enable; Active scripting = Enable ABBYY FlexiCapture works best with Google Chrome and other Chromium-based browsers. The Metro-style version of Internet Explorer 10 that comes with Windows 8 is not supported. To ensure that Internet Explorer 11 works correctly, install .NET Framework 4.7.2 on the computer with the Application Server, or add the address of an application server to the list of websites that are opened in compatibility mode. **Disclaimer for Internet Explorer users / Known issue** Due to the known limitations of Internet Explorer 11, you may experience issues when processing more than 100 pages or handling numerous verification tasks with ABBYY FlexiCapture. Using Internet Explorer for an extended period can cause the browser to consume a lot of the machine's memory, slow down client performance, and eventually crash. To avoid unwanted interruptions, ABBYY recommends using Microsoft Edge, Google Chrome, or another browser for professional verification tasks. ABBYY FlexiCapture web stations are fully functional in Internet Explorer 11, so use it preferably for ad-hoc processing. Important notes for users of Internet Explorer: 1. In the event of a verification malfunction, the operator cannot resume the task immediately after the session is restored. The task becomes available only after inactive sessions have been purged. By default, inactive sessions are purged every 4 hours. You can change this setting in the `web.config` file on the Processing Server. Purging inactive sessions too often is not recommended; the recommended minimum is 10 minutes. 2. Starting from FlexiCapture R3 Update 1, each new task opens in a new tab to optimize memory use. This also means operators cannot receive new tasks automatically. To revert to the old behavior, open the `web.config` file for the web station and set the `IEVerificationNewWindow` key to `false`. 3. In Internet Explorer 11, users cannot enter Japanese text using the corresponding Microsoft IME. **Other requirements** * Video card and display with a resolution of 1024×768 * For the Web Scanning Station: a scanner supporting the TWAIN interface (WIA scanners can be accessed from the station but may not operate properly), and the ABBYY Scanning Plugin (see below) ## ABBYY Scanning Plugin To ensure the correct operation of the Web Scanning Station, you must install the ABBYY Scanning Plugin. The following table lists the operating systems on which the ABBYY Scanning Plugin can be installed, and the permissions required. **Can install** indicates whether the plugin's executable file can be installed. | OS | Permissions | UAC | Can install | | :--------------------- | :------------ | :---------- | :---------- | | Windows Server 2012\* | Administrator | Recommended | Yes | | Windows Server 2012\* | Administrator | No | Yes | | Windows Server 2012\* | User | Recommended | No | | Windows Server 2012\* | User | No | No | | Windows Server 2012 R2 | Administrator | Recommended | Yes | | Windows Server 2012 R2 | Administrator | No | Yes | | Windows Server 2012 R2 | User | Recommended | No | | Windows Server 2012 R2 | User | No | No | | Windows 10 | Administrator | Recommended | Yes | | Windows 10 | Administrator | No | Yes | | Windows 10 | User | Recommended | Yes | | Windows 10 | User | No | Yes | | Windows 11 | Administrator | Recommended | Yes | | Windows 11 | Administrator | No | Yes | | Windows 11 | User | Recommended | Yes | | Windows 11 | User | No | Yes | \* To allow the ABBYY Scanning Plugin to be installed on Windows Server 2012, run the executable file `Setup.exe` as Administrator, or change the security policy by setting the value of the registry key `HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Installer DisableMSI` to `0`. ## Remote Verification Station **CPU** 2 GHz or faster **Operating system** * Windows 10 * Windows 11 * Windows Server 2012 + Desktop Experience * Windows Server 2012 R2 + Desktop Experience * Windows Server 2016 + Desktop Experience * Windows Server 2019 + Desktop Experience * Windows Server 2022 + Desktop Experience * Windows Server 2025 + Desktop Experience To use a localized version of ABBYY FlexiCapture, make sure your operating system supports the corresponding GUI language. **RAM** 1 GB **Disk space** 400 MB **Other requirements** * Video card and display with a resolution of 1024×768 * Microsoft .NET Framework 4.7.2 or later * Microsoft .NET Runtime 8.0 or later ## ClickOnce Scanning Station **CPU** 2 GHz or faster **Operating system** * Windows 10 * Windows 11 * Windows Server 2012 + Desktop Experience * Windows Server 2012 R2 + Desktop Experience * Windows Server 2016 + Desktop Experience * Windows Server 2019 + Desktop Experience * Windows Server 2022 + Desktop Experience * Windows Server 2025 + Desktop Experience To use a localized version of ABBYY FlexiCapture, make sure your operating system supports the corresponding GUI language. **RAM** 1 GB **Disk space** 1.5 GB (including 550 MB for installation and sufficient space for scanned images). The downloadable file is 270 MB. **Browser** For ClickOnce deployment: Internet Explorer 11 To ensure that Internet Explorer 11 works correctly, install .NET Framework 4.7.2 on the computer with the Application Server, or add the address of an application server to the list of websites that are opened in compatibility mode. **Disclaimer for Internet Explorer users / Known issue** Due to the known limitations of Internet Explorer 11, you may experience issues when processing more than 100 pages or handling numerous verification tasks with ABBYY FlexiCapture. Using Internet Explorer for an extended period can cause the browser to consume a lot of the machine's memory, slow down client performance, and eventually crash. To avoid unwanted interruptions, ABBYY recommends using Microsoft Edge, Google Chrome, or another browser for professional verification tasks. ABBYY FlexiCapture web stations are fully functional in Internet Explorer 11, so use it preferably for ad-hoc processing. Important notes for users of Internet Explorer: 1. In the event of a verification malfunction, the operator cannot resume the task immediately after the session is restored. The task becomes available only after inactive sessions have been purged. By default, inactive sessions are purged every 4 hours. You can change this setting in the `web.config` file on the Processing Server. Purging inactive sessions too often is not recommended; the recommended minimum is 10 minutes. 2. Starting from FlexiCapture R3 Update 1, each new task opens in a new tab to optimize memory use. This also means operators cannot receive new tasks automatically. To revert to the old behavior, open the `web.config` file for the web station and set the `IEVerificationNewWindow` key to `false`. 3. In Internet Explorer 11, users cannot enter Japanese text using the corresponding Microsoft IME. **Other requirements** * A scanner with TWAIN, WIA, or ISIS support * Video card and display with a resolution of 1024×768 * Microsoft .NET Framework 4.7.2 or later * Microsoft .NET Runtime 8.0 or later ## Virtual environments The system has been tested on the following virtual machines: 1. Virtual platforms that imitate physical machines: * VMWare Workstation (any version) * Hyper-V (any version). **Note:** the Hyper-V version corresponds to the version of the operating system, and Hyper-V virtual machines do not work with USB devices. * Oracle VirtualBox (any version) * VMWare ESXi (server included with VMWare vSphere, any version) 2. Virtual platforms that imitate workplaces and applications: * VMWare Horizon 5.2.0 * Citrix XenApp 7.13 3. Cloud services: * Microsoft Azure * Amazon Cloud