Windows 7 - Where is the windows photo viewer default location?

Where is windows photo viewer (the application .exe file) located by default on windows 7 64 bit?

I am trying to set it as the default program to open certain picture files because an essential program I run needs those specific file associations to be made or it will not work. But every time I try to set windows photo viewer as the default program, windows asks me to browse for the application, and it is nowhere to be found on the computer (although I know it is installed and runs perfectly fine). I have tried preforming searches within the computer and just cant find the .exe file I need, someone please point me in the right direction.

I use windows live photo gallery so i was unable to find it for you, i found wp gallery by typing windows photo viewer exe in the start search when i got a result i right clicked it and selected open file location,
another way to get the photoviewer as default viewer is to right click a photo and select open with then select choose default program, then select photo viewer from the list ,be sure to check the always use this prog for files of this type checkbox

Windows Photo Viewer is run by dllhost.exe COM Surrogate. Basically, it does not have it's own exe file, only dll.

To start Windows Photo Viewer from command line you would have to usewhere %1 is a full path to a file.

I am not sure how this is going to work for you.