PcaWallpaperAppDetect error

nikhilsinghal This is a known issue with Windows 11 version 24H2 (Build 26100) caused by a task in windows Task Scheduler that is calling an entry point in PcaSvc.dll that no longer exists in the new build. It seems Microsoft forgot to remove the task in Task Scheduler that calls that entry point.  It causes no issues other than displaying the error message at noon every 3 days. Microsoft will be rolling out a fix for it, but if you want to prevent the error message yourself, you can delete or edit the task in Windows Task Scheduler.  To open Task Scheduler, click the start menu and type 'Task Sched' and you should see the Task Scheduler app listed there.

In Task Scheduler you should see a pane on the left with an expandable list labeled "Task Scheduler (Local)". If you don't see such a list on the left, you might need to toggle the visibility by clicking the "Show/Hide Console Tree" icon near the top of the window. Once you see this list, click the arrow next to each entry to expand the list until you find the following entry:

Task Scheduler Library --> Microsoft --> Windows --> Application Experience --> PcaWallpaperAppDetect

When you find the entry, it might show a status of "running". If so, right-click the entry and select "End" from the context menu to stop the running task. Then right-click the entry again and select "Disable" or "Delete" from the context menu to disable or delete the task.  You can then close the Task Scheduler app and the error messages should no longer appear.