If you bought new or second laptop with windows 7/vista bundled from a certain country like Japan, Korea or China you will face difficulties with the language. The language interface is not english and it became a big problem.
If you try to find the solution from Microsoft, they will answer, please upgrade your windows to ultimate version. They ask you to waste your money, only to change the language.
Fortunately, I have easy and free solution for the problem like that. Hmm, actually the solution is not from me, but from vistalizator.