DCAgent manual removal from a Windows Server 2016 Core

Hi

You have to uninstall the old agent before you can install the new one.

I figured it out. You have to search registry for the old install, but use the full install path, to uninstall.

In powershell:

1) Use "wmic product" to see installed applications

This entry is currently showing after upgrade:

1               Fortinet Single Sign On DC Agent v5.0.0276                      Fortinet Single Sign On DC Agent v5.0.0276                                                                                    {855D2FD9-8CB6-44DC-935E-7526C113B56C}  20190719                                                            C:\Users\DuPlessisA\Downloads\                                                                                      5             1033      C:\Windows\Installer\6ae84.msi     Fortinet Single Sign On DC Agent v5.0.0276                      C:\Windows\Installer\6ae84.msi     {C98A71A9-1A4F-4C16-A3DB-B3FB0A5F0207}  DCAgent_Setup_5.0.0276_x64.msi                                                                                                                                                                   Fortinet               5.0.0276        2

Attempted "MsiExec.exe /X{855D2FD9-8CB6-44DC-935E-7526C113B56C}" to uninstall the old client, which did not work, and eventually figured out, and used "MsiExec.exe /uninstall C:\Windows\Installer\6ae84.msi", which worked to run the GUI uninstall for the DCAgent 5.0.256

2) Reboot

3) The install new client using the full path: "C:\Users\xxxxxxxx\Downloads\DCAgent_Setup_5.0.0276_x64.msi", which invoked the GUI installer. Configure DCAgent for your environment.

4) Reboot and check Collector agent for logons.

All good and working.