yeah, the access is denied (it happaned to me with MU online). you can choose to disable D+ and GameGuard wil run without errors (or put in My Own Fave Files). the nvidia driver error is because of the GameGuard. you can start it before you load the game and it will work without errors. if you have google product, Googleupdate.exe will report about errors while you play the game because GameGuard does not allow it to access to the memory.