1. Make sure that the required dynamic link libraries are present in your system by clicking the 'Start' button and then selecting 'Computer' or 'My computer.' In the window that opens, navigate to folder 'C:\Program Files\Common Files\Adobe\Acrobat\ActiveX.' Check that the following files are present: acropdf.dll, acroiehelper.dll and pdfshell.dll. If any of the files is missing, launch Reader and click 'Help' and then 'Detect and repair.'
2. Have Reader establish the missing connections between its plug-in and your installation of Internet Explorer by clicking the 'Start' button and then 'Add or remove programs.' Click 'Acrobat' in the list of programs, and then click 'Change.' Follow the prompts of the Adobe reconfiguration utility.
3. Reboot the computer. At that point, the Reader plug-in will be fully functional and will render any PDF Web page you navigate to within Internet Explorer.