The scanner and camera wizard program is:
C:\windows\system32\wiaacmgr.exe
This will connect to the scanner or camera and download images, and when finished, will open windows explorer in the directory the image was saved in from the wizard. Double clicking the image should preview it in the windows picture and fax viewer. If it doesn't, right-click on the image, choose Properties, then next to "opens with", click on the "change" button and choose the Picture and Fax Viewer.
Unfortunately the windows Picture and Fax Viewer appears to be integrated into windows explorer and is not a stand-alone program - at least, I can't find it anywhere
.
HTH.