Fix Browser Error: Unable to view PDF file in browser

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.' This post provide Internet browser Support to fix this issue.

Step 1
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following How to back up and restore the registry in Windows

Go to Start > Run
Type regedit and click OK.
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:
Start Acrobat or Adobe Reader.
Choose Edit > Preferences.
Select Internet on the left. Deselect Display PDF In Browser Using [Acrobat application], and then click OK.
Quit Acrobat or Adobe Reader.