Error while installing or updating Cisco Anyconnect Secure Mobilty Client: The file ‘Manifest Tool.exe’ is not marked for installation

Error while installing/ updating cisco anyconnect secure mobility client VPN is common in Windows OS

How to fix error while installing or updating Cisco Anyconnect Secure Mobilty Client

The file ‘Manifest Tool.exe’ is not marked for installation

• To fix error while installing cisco VPN, uninstall the existing version of the Cisco AnyConnect VPN client from the computer if any.
• Edit the registry; launch the Registry Editor simply by typing “regedit” in the search window.

• If a dialogue box pops up displaying the following: “Do you want to allow the following program to make changes to this computer?” Click Yes.
• Select the following location: HKEY_CLASSES_ROOT\Installer\Products\

• Inside Products folder, locate and delete the registry key which contains the product information for Cisco AnyConnect ( WE RECOMMEND TO CREATE BACKUP OF REGISTRY KEY BEFORE DELETING IT)
• Go through each key in the Products folder until you find the one for Cisco AnyConnect. Note: you will see an “alphanumeric” key as Shown in image below. Different versions of cisco anyconnect vpn have different keys.

• Close the Registry Editor window and install the cisco anyconnect vpn.