Kncowans, is it certain that this wininit.ini solution works on all systems (see the URL in my first message)?Hi DrillSergeant! Thank your for replying 
Oops, missed cj's reply there, thanks for showing me. Is perhaps the MV util from the Reskit the best way to do this on?
There is another util called "kill.exe", that actually stops the usage of files, althugh this seems quite risky (and perhaps Win will just fire up the system files needed again?).
I also thought of appending lines in the user's existing autoexec.bat. Perhaps copying a second admin.bat to the clients computer and edit the clients original autoexec.bat to exec the admin.bat is a good solution? An update could perhaps then depend of GetFileVersion() (and check autoexec.bat for any admin.bat references, and delete the line when no longer necessary)?