Way back in May 2008, I noted an annoying, longstanding bug that surfaces when you install Adobe Reader on Windows Vista x64. The preview function, both in Windows Explorer and in Outlook 2007, is broken. The only fix I could find at the time was to replace the broken previewer with a third-party alternative such as FoxIt PDF Preview Handler.
Now, 16 months later, there’s a new 64-bit operating system, Windows 7, and a new version of Acrobat Reader (9.1). And the bug is still there.
That’s really a good way to support your customers, way to go Adobe !
As mention in Ed Boot’s post, here’s the direct link to a manual fix : www.pretentiousname.com/adobe_pdf_x64_fix
Source : www.edbott.com/weblog