Hi !
Good news, i solved my issue with your last link. I checked the first part of the tuto you gived, creating a new user, and verifying if the issue appear. The issue appear but i noted that another program launched at startup : Explorer Patcher. I used it before Start11 enhancement was added (to keep programs titles visible in windows open in taskbar).
I disabled it when the Start11 did the same feature and i thought that it was removed (it is a dgxi.dll) but not and i forgot it ! This time a deleted it !
Sorry, because you asked me on June 5 if it was the case...😕
Thank you for helped me !