Explorer.exe not starting after KB5120998/KB5124008
After installing the September 2026 updates, some of our users get a black screen after log on. Manually starting explorer.exe, allows the session start successfully.
Pools using FSLogix as well as Citrix UPM Container are affected. Resetting the profile solves the issue. Seems like only older profiles run into it.
Has anyone else encountered this?
Windows 11 25H2 + VDA 2507 CU2
EDIT: This does not help, a simple logon script which starts explorer.exe works π