If you get an error message similar to this one when trying to run Quake 4…
Fatal Error: could not create destination file C:/Program Files (x86)/id Software/Quake 4 Multiplayer Demo/q4mp/gamex86.dll
…then you should run the exe as Administrator.
So Right-click, “Run as Administrator” and all will be sorted.
thanks for post good bye
I was getting this same error whenever I tried to enter multiplayer mode either to join or create a server. I set the q4.exe to run as admin and win7 compatibility and no more errors. Thanks for the tip.