Vista - Photo Gallery Error

I just loaded a new hard drive with Build 5728, and am having problems with
Photo Gallery. I've tried different photos from various sources, and while
I can see the "thumbnails", double-clicking on ANY of them gives me the
forever-spinning Vista wait-wheel. SOMETIMES, I'll get a message stating,
"This picture can't be displayed. You might not have enough memory
available. Close some programs or, if your hard disk is almost full, free
some disk space and try again."

The hard drive is new and passes diags, and I have a gig of RAM, which tests
good. I'm assuming that the program somehow became corrupted.

Anyone know how to reload JUST PHOTO GALLERY?