Personalization Reset and Re-register Windows Spotlight in Windows 11

@Osmium 24 hours just past and what happened is that thing I had long time ago when I stopped using spotlight:

The desktop image changed only on one of the desktops (I have 4 virtual of them), in the Settings app it changed to "Picture" instead of the "spotlight" for desktop. Now if I choose "Spotlight" in desktop it changes to "picture" instantly again. Even though it has downloaded 4 new images to "Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\LocalCache\Microsoft\IrisService"
As for the lock screen it seems to be working as I didn't want to wait and changed the photo myself by disliking, so now I have to wait one more day to be sure...

But this is exactly what it has been doing a year ago when I just couldn't fight any more and started using the Dynamic Theme app.

Meanwhile I'm still waiting to see what shall my second newly created test profile would bring today, I have to wait few hours more to see if it's gonna be the same bug, or not.

By the way, @Osmium I wanted to ask if you've done these 2 reset prompts as well together with reregistering?:

:: Re-register Windows Spotlight
PowerShell -Command "Get-AppxPackage -AllUsers *Microsoft.Windows.ContentDeliveryManager* | Reset-AppxPackage"
PowerShell -Command "Get-AppxPackage -AllUsers *MicrosoftWindows.Client.CBS* | Reset-AppxPackage"

Click to expand...

Yes, in the second new test profile I've created yesterday both desktop and lock screen spotlight work and it loaded the images after 24 hours too. There is also the "learn about this picture" button in the second profile and I can change to any of 4 images no probs.

So, somehow it doesn't want to work with my main profile... Only one thing I haven't tries yet to do those 2 prompts above, otherwise I don't know what to do else

Also, I notices that there is no "roaming.lock" file in my main profile's "%USERPROFILE%/AppData\Local\Packages\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\Settings" folder but in the test user it has such file.

I have significantly cut back on my use of the package reset command; in my (possibly unique to me) case, something got broken somewhere between %LOCALAPPDATA%\Packages and the files in C:\Windows\SystemApps, where both Client.CBS and CDM keep their binaries and the reset did nothing useful because of that broken pipeline. After rebooting, the %LOCALAPPDATA% folder that was deleted during the reset had been dutifully recreated, but there were many things missing inside.

So, your mileage will vary depending on your problem's root cause. A reset could fix it or just reinstate the issue. Mine was so deeply rooted that nothing short of a Windows Update repair could fix it - and, as radical a remedy as it was, it did a much more thorough job than a mere reset and Windows did feel snappier at the end of it.

One thing you could do is go from one user account to the other and compare the structures and contents of the following registry entries:
Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\DesktopSpotlight
Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager
Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\IrisService
Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Lock Screen
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\Creative\***SID***
Just for starters.
Note that some of the entries (like timestamps), as I mentioned earlier, are merely for record-keeping and manually changing them doesn't really trick Windows into updating sooner.

(note: you can find the current user account's SID by executing Get-LocalUser -Name $env:USERNAME | Select-Object SID in PowerShell)

@Osmium thanks, I compared the entries and the most that differs is the following: Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Lock Screen

In my main user's there is a lot more information, rather then in the new one and there are values about the Dynamic Theme App which I have installed, is there any chance that it may be the reason why the OS's desktop spotlight is not working in my user?

Oh, I have also found that there are more values in my main profile in the "Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\DesktopSpotlight" and it's exactly the localization info which should be EN. You can check the screenshot and there is in the upper part my main profile (broken) and in the lower the new working profile. Apparently that info was left after some OS updates (25H2)... Can I try to just remove those additional valuse?

Guys, just a quick update, I'm still trying to solve the issue with my main user and I can't make the desktop to work, so only lock screen is working. In the meantime the newly created working test user works fine (they are both local users) as for the lock screen as for the desktop. I've even deleted the DefaultCreatives registry value in "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\DesktopSpotlight"' and after a restart the OS has recreated it in English and finally the button "Learn about this picture" switched to the English localization too but still photos are not fetched to the desktop after 24 hours as they are in the new temp user. So, it seems the only working method for me is to create a new user and reconfigure it, but I'm still wondering if there are any other ways of resetting, or reinstalling the CBS then doing these:

PowerShell -Command "Get-AppxPackage -AllUsers *MicrosoftWindows.Client.CBS* | Reset-AppxPackage"

PowerShell -ExecutionPolicy Unrestricted -Command "& {$manifest = (Get-AppxPackage *MicrosoftWindows.Client.CBS*).InstallLocation + '\AppxManifest.xml' ; Add-AppxPackage -DisableDevelopmentMode -Register $manifest -Verbose}"

It seems that CBS is stuck in the 24H2 "unworking state" for my main user profile, so perhaps only a more drastic reset or rebuild will fix the issue.