Install or Uninstall a Horizon Agent for Windows Patch Silently

You can use the silent installation feature of the Microsoft Windows Installer (MSI) to install and uninstall a Horizon Agent patch. In a silent installation, you use the command line and do not have to respond to wizard prompts.

Prerequisites

• Verify that you have administrative rights on the virtual machine or physical PC.

• Select the product version and download the Horizon Agent Update Patch installer file from the Omnissa Customer Connect.

  The installer filename has the pattern Horizon-Agent-x86_64-YYMM-y.y.y-xxxxxx.exe, where YYMM is the marketing version number, y.y.y is the internal version number, and xxxxxx is the build number.

Note: In the following examples, the name agent-installer.exe stands in for the downloaded installer file. Substitute the name of the installer exe you are using.

Procedure

1. Open a Windows command prompt as administrator on the virtual machine or physical PC.

2. To install a Horizon Agent patch where Horizon Agent is installed, run the .exe file: msiexec /p agent-installer.exe /qn REINSTALL=ALL”

   After installing the patch, verify the patch build number is updated in the Horizon Agent's HKLM\SOFTWARE registry entries for AgentVersions!view-agent and BuildNumber.

3. To uninstall a Horizon Agent patch where Horizon Agent is installed, run a PowerShell script: remove-patch.ps1

   ProductCode-driven command line example: msiexec /package {product_code} /uninstall {patch_guid} /passive

   After uninstalling the patch, check the Horizon Agent's HKLM\SOFTWARE registry entries for AgentVersions!view-agent and BuildNumber and verify that no reference of the patch exists. Verify the services are in the same state as they were before uninstalling the patch.