You also like to have your PDF files previewed in your Windows Explorer like this?
Locate the following key in the registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}
And change AppID value this from {6d2b5079-2f0b-48dd-ab7f-97cec514d30b} to:
{534A1E02-D58F-44f0-B58B-36CBED287C7C}
Enjoy the trick!