WoW aber nicht neu installiert?
Prüf die Treiber, ne neue Grafikkarte bedeutet nicht aktueller Treiber. (Sehe du hast nen neuen installiert, prüf mal via nvidia ob es der aktuellste ist!)
Bei anderen Spielen dasselbe Problem?!
Aus dem US-Forum (alt)
This was a bug over 10 years ago that’s long been fixed as far as I can tell.
I can reproduce it if I go in and alter a registry setting value for my video card that the game client checks, but it changes it back after generating the dialog box and doesn’t seem to really care how I answer it. I can only guess you might have a permissions issue with the Windows User account you’re using? Try creating a new one, exiting Windows, and getting back on with the new account and see if it does it again on the second try at logging in.
You may also need to ensure you have the Windows Secondary Logon Service enabled.