3java3: I dont have Start11 set to download updates automatically (it was 1.3 something before I updated it to 1.5 on wednesday). I've had Start11 installed since 1 or 2 months after Windows 11 was officially released, and the only time I remember seeing issues like this was early on (or on Start10 on Windows 10).
Basj: The only program I can think of is Winaero Tweaker, but it's not running anything in the background, and the only tweak used was the Classic Context menu change, and that was changed back in 2022.
As for Windows Updates, the only updates I have are the daily anti-virus updates for Microsoft Defender. the latest quality update was made on the 14th of March.
Only other Stardock product I have running is Fences 3.1.3.3