The error you're encountering while trying to upgrade the DPM agent on a Windows Server 2022 Core system seems to be related to uninstalling the previous version of the agent. The error code 0x80110809 indicates that the uninstallation process failed.
Here are some steps you can take to resolve this issue:
Ensure that all necessary dependencies for the DPM agent upgrade are met. This includes having the correct permissions, sufficient disk space, and any required prerequisites. Make sure the server is up to date with Windows updates as well.
If the uninstall process fails during the upgrade, you may need to manually uninstall the previous version of the DPM agent.
After the manual uninstall, check for any remaining registry keys related to the old DPM agent. Be cautious when editing the Windows Registry and only remove keys related to the DPM agent.
4.File System Cleanup:
Check for any remaining files or folders related to the old DPM agent. You might need to delete these manually if the uninstaller didn't remove them.
After you've manually uninstalled the old agent and cleaned up the registry and file system, reboot the server to ensure that any lingering processes or services are stopped.
6.Install the New DPM Agent:
Now, try installing the new DPM agent (10.22.189) on the server again.