@ponyguy
okay let's start this shit.
tutorial 1: windows update.
even if you did it already, do it again.
click on the windows symbol, then click on control panel.
search for the icon called windows update.
on the left side you will the option "search for updates". click on it and wait 'till it's done.
if he tells you that you have optional updates ready, click on it. DON'T click on "install updates". we want to know what he want's to install, right? ^^
if there are language packages ready to be downloaded, search for the japanese one. IF NOT, forget everything here and close everything.
if you however find it, mark it unmark everything else you don't wanna have and click on "install update".
if you need a video for tutorial 1, here you go (don't change your display language however):
edit: you might already read tutorial 2. i deleted it for safety, just do tutorial 1 first and tell me afterwards what you got.
oh and what windows 7 do you have? home or professional?