Question : Unable to view PDF files in a web browser

I keep getting this message. If I close the Adobe application multiple times, it eventually opens the document. It’s terribly annoying. Is there any way to change the Adobe settings to open PDF’s in a web browser?

Message box:
Adobe PDF Document
The adobe acrobat/reader that is running can not be used to view pdf files in a web browser. Please exit adobe acrobat/reader and try again.

Answer : Unable to view PDF files in a web browser

1.Install the latest version of Acrobat or Reader.

The latest version of Acrobat or Adobe Reader may be more compatible with the operating system and drivers. Before you install an update or upgrade, make sure that the system meets the requirements.

For updates, check the Adobe website at www.adobe.com/support/downloads . You can purchase upgrades from Adobe Authorized Resellers and from Adobe directly by visiting the Adobe website at http://store.adobe.com/store , or by calling Customer Services at 800-272-3623.

2. Remove all previous versions of Acrobat, and then reinstall.

Adobe doesn't support multiple versions of Acrobat on the same computer. Because Acrobat and Reader work with many products, multiple versions simultaneously installed can lead to software conflicts and errors.

   1. Choose Start > Control Panel (Windows XP) or Start > Settings > Control Panel (Windows 2000).
   2. Double-click Add Or Remove Programs.
   3. Select Adobe Acrobat [version] and click Remove.
   4. When prompted, confirm that you want to remove Acrobat.
   5. Repeat the above procedure for all installed versions of Acrobat.
   6. Restart the computer, and then reinstall Acrobat.

3.Repair the HKCR\AcroExch.Document registry key.

It is possible that this key is damaged, is pointing to an obsolete version of Acrobat or Reader, or is pointing to a third-party PDF viewer.

Disclaimer: This procedure involves editing the Windows registry. Adobe doesn't provide support for editing the registry, which contains critical system and application information. Make sure to back up the registry before editing it. For more information about the registry, see the Windows documentation or contact Microsoft.

   1. Choose Start > Run, type regedit in the Open text field of the Run dialog box, and then click OK.
   2. Back up your current Registry file:
         1. In the Registry Editor dialog box, choose File > Export.
         2. Type a name for the file and choose the location.
         3. For Export Range, choose All.
         4. Click Save.
   3. Navigate to HKEY_CLASSES_ROOT\AcroExch.Document.
   4. Right-click AcroExch.Document and select Delete; make sure you have the correct key, and click Yes on any prompts.
   5. Right-click AcroExch.Document.7 and select Delete; make sure you have the correct key, and click Yes on any prompts.
   6. Repair your Acrobat or Reader installation.