What does the following mean?

[dark_secrester]

I take it to mean something like: Could not install, already installed.
I am probably wrong, but I don't understand the kanji...

It is attached below. Please help...

[Damicci]

このインストールはお使いのオペレーティングシステムの現在の言語はサポートされていません。

The operating systems current language used is not supported by this installation.

This installation is not supported on the operating sytems current language.

[dark_secrester]

Thanks! Now I know what the problem is!