Dragon Nest JP

See, I don't see how that's the problem. I'm running on the American version of Windows 7, but when I switched everything to Japanese, my Internet Explorer converted automatically and everything runs perfectly fine. I didn't have to download a special OS just for Dragon Nest. Have you guys tried going to your Internet Explorer options and changing it to Japanese?

The American version of Windows 7 Ultimate can be switched entirely into Japanese by using that feature only in that version.