Cannot configure Windows Photo Viewer as In-App

Question

I&acute;m using the Safeguard 8 and i cannot access to jpg files (that were previously encrypted using safeguard 7) using the Windows Photo Viewer on windows 8 .The keyring has the key that was used to encrypt the file (in fact the file encryption context option states that i&acute;ve access to the file because i&acute;ve the key on my keyring. 
 Problem is that meanwhile i&acute;ve upgraded to Safeguard 8, and i think that this is related to the fact that the Windows Photo Viewer is not a In-App (after the upgrade to Safeguard 8 i&acute;m using the syncronized encryption). 
 
 I&acute;m trying to use several diferent configurationn to configure the application on the application policy e.g: -C:\Program Files\Windows Photo Viewer\PhotoViewer.dll -%ProgramFiles%\Windows Photo Viewer\PhotoViewer.dll 
 Problem is that the application is launched by rundll32 and Safeguard does not like the format: C:\Windows\System32>rundll32.exe "C:\Program Files (x86)\Windows Photo Viewer\PhotoViewer.dll" 
 I&acute;m doing this the wrong way?

FormerMember · Answer

Hello Peter, 
 If your files are encrypted with Synchronized/Application Encryption (where they have the green padlock on them) then you can only configure programs to view them that have an executable. PhotoViewer is a DLL so to allow PhotoViewer you would have to allow rundll32.exe access which would be a huge security flaw and is therefore not allowed. 
 Typically if your images became encrypted it was because they came from a program (ie: saved from a PowerPoint Presentation). If that's the case they'll still be viewable in that application. 
 if you want to view these images you will need to add a trusted image viewer (that comes as an exe) or decrypt the images.