PLEASE NOTE:  This solution only applies to machines running 64-bit versions of Windows Vista and 7.  It does not apply to other versions of Windows or to any 32-bit version of Windows.

On Windows Vista 64-bit and Windows 7 64-bit, users have noticed that with Adobe Acrobat (Pro or Reader) installed, Windows Explorer and Microsoft Outlook 2007/2010 do not preview PDF files like they should be.  A simple registry fix has been discovered, although not from Adobe or Microsoft, that correctly points Windows Explorer and other applications, like Outlook, to the Adobe PDF Preview Handler.

In the attached ZIP file, there are two registry import files:

  • “adobe_pdf_x64_fix.reg” – Fixes the 64-bit PDF handler issue
  • “adobe_pdf_x64_upgrade_fix.reg” – Fixes the 32-bit to 64-bit redirected registry setting.  Only use this import if the first file does not fix the issue.  Most commonly this file is needed if Windows was upgraded from Windows Vista to Windows 7 instead of doing a fresh install.

The original post about this can be found at:  The author of that post has also provided a tool that can also apply the fix without you having to mess with your registry.


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