I created an application object to install NwClient 4.91Sp4 (UNC-path
\\servername\public\client\setupnw.exe; parameters: /acu /u:unattend.txt;
environment: Unsecure System User). Installion begins but at the end I get
an error message from NMAS-Client:
>>There is a problem with this Windows Installer package. A programm
>>required for this install to complete could not be run. Contact your
>>support personnel or package vendor. Action: ncc.exe, command: -s -c
>>update <<OK<< <<

If I start the installation as a normal user with admin-rights it's alright.

Best regards
Thomas Rieger