I came across this issue on my machine today and wasn’t sure if it was a first time thing or if it had always been there. I don’t normally preview PDF’s so much so possibly the later.
Anyway, the reg file did as advertised on this blog post. Thanks so much Adobe.
Adobe PDF preview handler 64-bit fix
Basically:
Open RegEdit and go to:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}
There should be an existing AppID value, incorrectly set to {6d2b5079-2f0b-48dd-ab7f-97cec514d30b}
Change the AppID value to {534A1E02-D58F-44f0-B58B-36CBED287C7C}
