Frequently Asked Questions
Frequently Asked Questions: M-Files
How to Enable the Preview feature of PDF Files in 64-bit Windows 7 PC
Posted by Timo Lahti (M-Files) on 16 March 2011 03:49 PM


If you are running the 64-bit version of Windows 7 (or Vista), you may find that your PDF files do not preview in Windows Explorer or at M-Files preview window, as they do in the 32-bit versions. Instead, all you see is a message stating that This file can’t be previewed. To enable this functionality on your 64-bit operating system, follow these steps.


  • M-Files Client software version 7, 8 or 9
  • Adobe Reader 8.2 or newer
  • Windows 7 64-bit operating system


These steps must be done with administrator's priviledges, as they involve changes to the Windows registry.

1. Click the Start Button at Windows Desktop

2. Go to the Search programs and files textbox and input regedit.

3. Select regedit.exe from the results.

4. When the UAC prompt appears, click the Yes button.

5. In the left pane of the Registry Editor, go to (and select):

6. In the right pane, locate AppID.

7. Change AppID value to {534A1E02-D58F-44f0-B58B-36CBED287C7C}.

8. Restart your computer for the change to take affect.

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