If it is a photo CD, like Kodak, is should have a self running program on it. Just insert and it should start by itself. If not, go to Windows Explorer and look for the D drive (most likely D) and there should be a program there in the list to run.
If it is just a CD with pictures on it, same thing, I would go to Windows Explorer, click on a picture file, it should bring up your default viewer and then just forward through them.