Today I unexpectedly had a challenge upgrading a Citrix XenApp 7.6 VDA to Citrix XenDesktop 7.8 VDA on Windows 2012 R2. During the in-place-upgrade of the 7.8 VDA or a reinstallation of the 7.8 VDA, the installation fails at the section Virtual Delivery Agent:

The XenDesktop Installation log (opened if Show error log is enabled) is showing the following error:

13:20:54.8513 $ERR$ : XenDesktopSetup:Installation of MSI File ‘IcaTS_x64.msi’ failed with code ‘InstallFailure’ (1603).

13:20:54.8513 $ERR$ : XenDesktopSetup:InstallComponent: Failed to install component ‘ICA for Remote Desktop Services’. Installation of MSI File ‘IcaTS_x64.msi’ failed with code ‘InstallFailure’ (1603).

13:20:54.8523 $ERR$ : XenDesktopSetup:Recording installation failure. Installation of MSI File ‘IcaTS_x64.msi’ failed with code ‘InstallFailure’ (1603).

The following error is in the Application log of the Windows Eventviewer:

Product: Citrix HDX TS (retail) – Error 1911. Could not register type library for file C:\Program Files\Citrix\Euem\Service\SemsComLibrary.tlb. Contact your support personnel.

To solve this issue, uninstall the following Windows updates prior updating or installing the Citrix XenDesktop 7.8 VDA:

After the VDA upgrade/installation it is save to reinstall the KB updates again!