This site is only for Avast Business products. For articles on AVG Business products, see AVG Business Help.

Installing the Avast agent on deprecated systems

This Article Applies to:

  • Windows XP (32, 64-bit)
  • Windows Vista
  • Windows Server 2003
  • Windows Server 2003 r2
  • Windows Server 2008

This article is meant for devices tied to the management consoles: Business Hub and Avast Business On-Premise Console. The AVG agent does not support deprecated systems.

Error on legacy OS

If you attempt to install the latest Avast Business agent on a legacy operating system, you may receive the error below:

This application has failed to start because bcrypt.dll was not found. Re-installing the application may fix this problem.

You must install the final supported version (22.1) of the agent using the process below.

Installing 22.1 agent

While not all features are available for older operating systems, the Avast agent can be installed on deprecated systems using this process.

  1. Within your Console, download a fresh installation file as normal
  2. Open PowerShell and run the following command to pull the installation parameters, replacing "avast_business_agent_*.exe" with the path for downloaded installation file: (Select-String -Path "avast_business_agent_*.exe" -Pattern "ExecuteParameters=" | out-string) -replace "\\"
    • You should receive parameters similar to this: -i -tok "a50b5d6baeef45fd8ac6fb979d304f91a4d8ab5a58cd6103e1e1c" -svr "" -lid "1" -bid "4" -debug "1" -avc "/managed"
  3. Download the Avast agent file
  4. Run setup with the gathered parameters
    • For example: avast_business_agent_setup_online.exe -i -tok "a50b5d6baeef45fd8ac61c2f4a3b979d304f91a4d8ab5a58cd6103e1e1c" -svr "" -lid "1" -bid "4" -debug "1" -avc "/managed"

At this point, setup will install the 22.1 agent on the device.