Dell Optimizer app cannot be installed

Hi Community,

the installation of the Dell Optimizer app fails because a legacy app (Dell Power Manager Service) is supposedly still installed. Setup reports that an unsupported application is being removed, but the attempt fails.

However, such a service does not exist on the computer, and it is not listed under Programs and Features.

The output in the log file is so vague that it is impossible to determine why the legacy app is supposedly found.

    7-30-2025[04:12:58]: (PowerShell Action): XML Entry for DellInc.DellPowerManager is of APPX Package type
    7-30-2025[04:12:59]: (PowerShell Action): Provisional appx package not found for DellInc.DellPowerManager . Traditional search returned 
    7-30-2025[04:12:59]: (PowerShell Action): DellInc.DellPowerManager is APPX and not found
    7-30-2025[04:12:59]: (PowerShell Action): XML Entry for Dell Power Manager is of MSI Package type
    7-30-2025[04:12:59]: (PowerShell Action): MSI Package found, getting product code

...

    7-30-2025[04:13:35]: Running event 'RemoveLegacyApps'
    7-30-2025[04:13:35]: Engine: request for proxy handler, 0, 0
    7-30-2025[04:13:35]: (PowerShell Action): Attempting to load through CLR 4 APIs...
    7-30-2025[04:13:35]: (PowerShell Action): Getting meta host...
    7-30-2025[04:13:35]: (PowerShell Action): Enumerating available runtimes...
    7-30-2025[04:13:35]: (PowerShell Action): Highest available runtime: v4.0.30319
    7-30-2025[04:13:35]: (PowerShell Action): Trying to use highest runtime...
    7-30-2025[04:13:35]: (PowerShell Action): Using highest version runtime...
    7-30-2025[04:13:36]: (PowerShell Action): Dell Power Manager Service
    7-30-2025[04:13:36]: (PowerShell Action): Dell Power Manager Service!MSI!msiexec.exe!/x {a8dfe386-5055-48f6-95c9-8df312812625} /qn REBOOT=REALLYSUPPRESS /l*v "C:\Users\ADMINI~1\AppData\Local\Temp\DellPowerManagerService-MSIUninstall.log"
    7-30-2025[04:13:36]: Engine: property 'REMOVE_LEGACY_APP_STR' value now 'Dell Power Manager Service'
    7-30-2025[04:13:36]: (PowerShell Action): Setting up progress window
    7-30-2025[04:13:36]: (PowerShell Action): Creating Datatable objects
    7-30-2025[04:13:37]: (PowerShell Action): Uninstalling Dell Power Manager Service with Type: MSI Command: msiexec.exe Arguments: /x {a8dfe386-5055-48f6-95c9-8df312812625} /qn REBOOT=REALLYSUPPRESS /l*v "C:\Users\ADMINI~1\AppData\Local\Temp\DellPowerManagerService-MSIUninstall.log"
    7-30-2025[04:13:38]: (PowerShell Action): Uninstall of Dell Power Manager Service Failed with exit code: 1605
    7-30-2025[04:13:38]: Engine: property 'REMOVE_LEGACY_APPS_SUCCESS' value now '0'
    7-30-2025[04:13:38]: Engine: property 'REMOVE_LEGACY_APP_FAILED_LIST' value now 'Dell Power Manager Service'
    7-30-2025[04:13:38]: Action returned value 0x00000000
    7-30-2025[04:13:38]: Action 'RemoveLegacyApps' returned status 0x00000000

These could just be leftover fragments from a previous installation.
What else needs to be manually removed so that the Optimizer app can be installed?

Best regards from Fireraiser