How to Pick the Default Viewer in IE for the PDF

1. Close Internet Explorer. Start the Adobe Acrobat Reader program.
2. Click "Edit" and select "Preferences." From the list on the left, select "Internet."
3. Uncheck "Display PDF in browser" and click "OK." Open the "Preferences" window again. Select "Internet." Place a check next to "Display PDF in browser."
4. Open Internet Explorer. Click "Tools." Click "Manage Add-ons."
5. Click "Toolbars and Extensions." Look for and right-click "Adobe Acrobat Control for ActiveX (pdf.ocx)." Select "Enable." Click "OK."
6. Restart Internet Explorer. PDF files opened within Internet Explorer will display within the browser itself.