I was having issues with previewing Adobe PDF and MS Office documents in MS Outlook 2010 i.e. preview didn’t work and the message “This file cannot be previewed because of an error with the following previewer: PDF Preview Handler for Vista” appeared instead. I’m running Windows 7 but it applies there as well, so I looked for an answer and thought I’d share.
This solution was provided by Leo Davidson who has also written a registry fix utility but I elected to do the fix manually.
First, open regedit.exe and browse to the following key:
Now change the AppID value to the following
Click OK and you should be able to preview PDF and other files. It worked for me, so thanks Leo.