Hello All again,
below is a screenshot from the Event Viewer:
Basically it says that there is an already exsisting version of teh software and that's why it cannot uninstall newer version.
The error message is:
Windows Installer reconfigured the product. Product Name: McAfee Endpoint Encryption Agent. Product Version: 18.104.22.168. Product Language: 1033. Reconfiguration success or error status: 1638.