Usually Internet Explorer is configured automatically when you install Acrobat Reader. If you install Internet Explorer after the Acrobat Reader, the Internet Explorer might not recognize the PDF file type. In this case, follow the steps below to start Acrobat Reader when you open a PDF file:
1. On the View menu, click Options.
2. Click the Programs tab, and then click File Types.
3. Click New Type.
4. In the "Description of type" field, type "Adobe Acrobat Document." In the extension field, type "pdf."
5. To define a new action for this file type, click New.
6. Specify the action that you want to define, such as Open or Print, and then type the path or click "browse" to locate Acrobat Reader.
Tip
For Help on an item, click "?" at the top of the dialog box, and then click the item.