hi daryl, welcome to the forum.
if i were you i would download windows live photo gallery, this has the added bounus of being able to edit the pictures and more. Windows Live Photo Gallery - Windows 7 features - Microsoft Windows
once you have installed if you choose to, then right click a picture and select open with ,then select set default program then select windows live photo gallery, make sure the box is checked for always use this program
the install will install windows live essentials, choose the "select which programs to install" ,only the photo gallery if you choose.