Problems, Crashes and Errors of Monster Hunter 4 Ultimate TODAY

The 6-4 error is a network problem people have been facing while connecting to the game.
Most of the time, MH Now 6-4 error happens when trying to create or join a hunt.
However, some people have also reported that they faced this issue while claiming a free or paid reward in the shop.

If you're big into multiplayer, definitely go with Gen, but if you don't mind or prefer going solo, then you may want to go with 4U.
Most of the veterans all agree Gen is the easier game if you already know what you're doing, but there's just an absolute information overload for newcomers.

Solution 1: Check the Monster Hunter: World PC Specs.
Solution 2: Install the Latest Game Patches.
Solution 3: Run the Game as an Administrator.
Solution 4: Disable Fullscreen Optimizations.

Monster Hunter 4 Ultimate is utterly magnificent.
Newfound vertical freedom, extraordinary new monsters and native 3DS multiplayer makes for the best game in the series to date, coupled with a much more compelling storyline and some killer new features.