I really discourage anyone from running games with administrative rights.
Setup and patching with administrative rights is okay, but not the usual operating =
gaming session. I personally consider games, which demand administrative rights,
as "massively broken by design". Some months ago i returned such a game to the online
seller, although he said, he took it back by goodwill.

Luckily Neocron 2 is able to run with normal user privileges. Just install NC2 within
any other folder than "C:\program files" or "c:\program files (x86)" (or similar). For
example "c:\my_games\" with r/w rights for any user would be fine.

It's working fine that way within Windows 7 64bit.