Hi all.

Thank you for replying \:\)

Launching the logon script via GPO is currently not an option.

I've now debugged the logon script to see which commands are causing the "Access is denied" errors.

* Copying files to the desktop of the "All users" profile
* Copying files to Windows folder (%systemroot%) and subfolders (e.g. HOSTS and SERVICES file)
* Editing the registry - HKLM - via "reg delete" command
* Setting the password for the local administrator account via "NET USER administrator MyPassword"
* Some software installations simply don't run (the process is not executed if you monitor via the Task Manager). Running the same command manually is working fine