ここから本文です。

Internet Explorer

1. Open Control Panel.

2. Confirm that "View by:" on the top-right of the window is set to "Category."

3. Click "Programs."

Click "Default Programs."
 

4. Click "Make a file type always open in a specific program" on the window displayed.

Click "Associate a file type or protocol with a program" on the window displayed.

5. Confirm that the Current Default of ".pdf" is Adobe Reader.

Confirm that the Current Default of ".pdf" is Adobe Reader.

* If Adobe Reader is not set, click "Change program..." and select Adobe Reader, then click "OK."

If Adobe Reader is not set, click "Change program..." and select Adobe Reader, then click "OK."