Hello Ivo,
Ok I think It's not easy.
I have work today on my vm and I have found maybe 2 ways for a solution. (I send the printscreens on the zip attachement)
1.
When I'm in Group Admin Local with my user, I have not problem. It's run very well.
When I'm in Group User (without rights) with my user, the problem come.
On this website
https://msdn.microsoft.com/en-us/library/bb625963.aspx (Table 7 Integrity levels linked to specific SIDs) I read that:
If admin mode explorer.exe run in HIGH Assigned integrity level (Administrators)
If user mode explorer.exe run in MEDIUM Assigned integrity level (Authenticated Users)
2.
When I'm in Group User (without rights) with my user, the problem come.
First time In Process Explorer, the process ClassisStartmenu.exe is under Explorer.exe.
When the stuck coming is restart explorer.exe, the process ClassicStartmenu.exe is alone not under Explorer.exe.
I close my session and I restart my session and I have no problem.
Another information:
In my Virtual environnment, I use VMWare UEM for the userprofile.
Classic Shell use special folder or registry in the user ? Beacause I'ts very important that I capture this settings.
Thank's for your help.
David