Download the "packet communications optimization tool" which is compressed in a self-extracting format from the download page, and save in any location (desktop, etc.).
Double click on the saved file (auPsetInst.exe).
Carefully read the license agreement, and click "Yes"（はい） to agree.
Specify the installation destination folder for the program. If changes are not required, click "Next"（はい）.
Clicking "Next"（はい） will start the copying of the file.
When the following screen is displayed, the installation is completed. Click "End"（完了）.