Instructions for setting Adobe Acrobat Reader to run outside your browser:

1) Start Adobe Acrobat Reader.
2) Click on 'Edit'.
3) Click on 'Preferences'.
4) Click on 'Options'.
5) Remove the tick/check mark if there is one shown by 'Display PDF in browser' in the 'Web Browser Options' section.
6) Click on 'OK'.
7) Exit Adobe Acrobat Reader.