Unable to view PDF file in browser

Note: You need to take registry back up to modify anything in registry.

How to back up and restore the registry in Windows

SUMMARY

When you view a PDF file in a browser (for example, Internet Explorer or Firefox), the following error message occurs, 'The Adobe Acrobat/Reader that is running cannot be used to view PDF files in a web browser. Adobe Acrobat/Reader version 8 or 9 is required. Please exit and try again.'

Step 1

1. Go to Start > Run
2. Type regedit and click OK.
3. Browse to the following key: HKEY_CLASSES_ROOT\Software\Adobe\Acrobat\Exe Make sure that the correct Default data value is set for the path where Adobe Reader or Acrobat are installed.
   
   Note : The default installation values are 'C:\Program Files\Adobe\Reader 9.0\Reader\AcroRd32.exe' or 'C:\Program Files\Adobe\Reader 9.0\Reader\Acrobat.exe', depending on whether Adobe Reader or Adobe Acrobat is installed

Step 2

To configure Acrobat or Adobe Reader as a helper application:

1. Start Acrobat or Adobe Reader.
2. Choose Edit > Preferences.
3. Select Internet on the left. Deselect Display PDF In Browser Using [Acrobat application], and then click OK.
4. Quit Acrobat or Adobe Reader.