Windows installation of GlobalProtect 5.2.11 fails with "Error 1714" even following complete manual uninstallation of GlobalProtect

• Windows installation of GlobalProtect 5.2.11 fails even following complete manual uninstallation of GlobalProtect.
• During installation a dialog box opens reading:

The feature you are trying to us is on a network resource that is unavailable.
Click OK to try again, or enter an alternate path to a folder containing the installation package 'GlobalProtect64.msi' in the box below.

Use source:
C:\WINDOWS\ccmcache\a\.

• The install log shows:

Error 1714. The older version of GlobalProtect cannot be removed.\'a0 Contact your technical support group.\'a0 System Error 1612.\.

• Windows 10
• GlobalProtect 5.2.11

• GlobalProtect checks for existing installations and finds an existing Windows Product Code  
• Uninstallation of the previous GlobalProtect installer is attempted but fails when original MSI is no longer available.
• There is an existing Windows Product Code at 'Computer\HKEY_CLASSES_ROOT\Installer\Products\<ProductCode>
• The ProductName is 'GlobalProtect'

1. Identify the registry key for the old GlobalProtect installation
   • Method 1: Search the registry directly:
     • Open RegEdit
     • Select "Computer\HKEY_CLASSES_ROOT\Installer\Products\"
     • Search for the ProductName "GlobalProtect"
   • Method 2:  Install MSI with verbose flag
     • Run: msiexec /i <GlobalProtect64.msi> /l*v GP_install_log.txt
     • Search text file for GUID
     • Open RegEdit
     • Select "Computer\HKEY_CLASSES_ROOT\Installer\Products\"
     • Search for the identified GUID
   • 
2. Select identified registry key; right click then export the key
3. Delete the identified registry key
4. Install GlobalProtect MSI