Applying a patch involves downloading and running the installer for the patch version. Not all patch releases include patches for View Composer.


  • Determine when to perform this procedure. Choose an available desktop maintenance window. Budget 15 minutes to half an hour for installing the patch version.

  • Verify that you have a domain user account with administrative privileges on the hosts that you will use to run the patch installer.

  • If View Composer is installed in a virtual machine, take a snapshot of the virtual machine.

    For instructions on taking snapshots, see the vSphere Client online help.

  • Back up the vCenter Server database and the View Composer database.

    For instructions on performing a database backup, see the documentation from your database vendor.

  • For all linked-clone desktop pools, disable provisioning of new virtual machines.

  • If any desktop pools are scheduled to do a refresh or recompose operation, cancel these tasks.


  1. On the virtual machine that hosts View Composer, download the installer file for the patch version of View Composer.

    Your contact at VMware will provide instructions for this download.

  2. Run the installer that you downloaded for the patch release of View Composer.

    With Horizon 6 version 6.2 and later releases, you are no longer required to uninstall the previous version before installing the patch.

  3. Verify that the VMware Horizon View Composer service restarts after the installer wizard closes.
  4. If applicable, apply the patch for Horizon Agent on a parent virtual machine and create a desktop pool for testing purposes.
    1. Download and run the Horizon Agent patch installer on a parent virtual machine.

      Your contact at VMware will provide instructions for this download.

    2. Create a small linked-clone desktop pool from this virtual machine.
    3. Test a virtual desktop from the desktop pool to verify that all the usage scenarios function properly.

      For example, create a desktop pool that contains one virtual desktop, and verify that you can use Horizon Client to log in to that desktop.

      Step-by-step instructions for running the Horizon Agent installer and creating desktop pools appear in Setting Up Virtual Desktops in Horizon 7, available by clicking the Help button in Horizon Administrator.

    4. Verify that virtual desktops from the test desktop pool work as expected.

What to do next

Apply the patch to View Connection Server, if applicable.