For Windows 7: Picture Viewer Software

Natively opens JPEG, PNG, BMP, GIF (static only), and TIFF files.

Full-screen viewing, zooming, 90-degree image rotation, direct printing, and disc burning. Picture Viewer Software For Windows 7

If your pictures are opening in a different application, you can easily restore Windows Photo Viewer: any image file. Natively opens JPEG, PNG, BMP, GIF (static only),