In the Microsoft forum, some users complain that their Windows 11 desktop background keeps changing.
This issue is often triggered by corrupted Windows files, misconfigured parameters, faulty Windows update changes, etc.
So, the following methods will target the possible triggers to troubleshoot them one by one.
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Dont worry, this post provides methods for you to fix it.
Change Desktop Background options
The Slideshow feature can make Windows 11 keep changing the desktop background.
If you haveenabled Slideshow, you’re able to switch to other choices in Personalization configs.

Step 1: OpenSettingsand go to thePersonalizationtab.
Step 2: ChooseBackgroundand expand the drop-down menu next toPersonalize your background.
Then choosePictureorSolid colorfrom the list.
you’re free to take a stab at turn off the sync tweaks.
Step 1: OpenSettingsand go toAccounts > Windows backup.
Step 2: LocateRemember my referencesand turn it off to prevent Windows from syncing any data.
%USERPROFILE%\AppData\Roaming\Microsoft\Windows\Themes\
Step 3: Choose to delete all the contents in that folder.
If you cant locate them, clickView > Show > Hidden itemsin File Explorer to show the hidden items.
Step 1: Open File Explorer and show your hidden items.
Step 2: Go toC:\Users\bj\AppData\Local\Microsoft\Windows\Explorer.
Then replacebjwith your username to locate the folder.
Then start your PC to trychanging the wallpaper.
Step 1: OpenRunand typeregeditto enter.
Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies
Step 2: Right-press Policies and chooseNew > Keyto name itActiveDesktop.
Step 3: Right-choose theActiveDesktopkey to chooseNew > DWORD (32-bit) Value.
Step 4: Then double-pick the value to enter1inValue dataand clickOK.
Bottom Line:
Many users find the Windows 11 desktop background keeps changing automatically.
This issue happens because of misconfigured tweaks or corrupted files.