Try IrfanViewer. It's the best photo viewer for me. - http://www.irfanview.com/
IrfanView is a very fast, small, compact and innovative FREEWARE (for non-commercial use) graphic viewer for Windows 9x, ME, NT, 2000, XP, 2003 , 2008, Vista, Windows 7.
It is designed to be simple for beginners and powerful for professionals.
IrfanView seeks to create unique, new and interesting features, unlike some other graphic viewers, whose whole "creativity" is based on feature cloning, stealing of ideas and whole dialogs from ACDSee and/or IrfanView! (for example: XnView has been stealing/cloning features and whole dialogs from IrfanView, for 10+ years).
IrfanView was the first Windows graphic viewer WORLDWIDE with Multiple (animated) GIF support.
One of the first graphic viewers WORLDWIDE with Multipage TIF support.
The first graphic viewer WORLDWIDE with Multiple ICO support.
Some IrfanView features:
Many supported file formats (click here the list of formats)
Multi language support
Thumbnail/preview option
Paint option - to draw lines, circles, arrows, straighten image etc.
Toolbar skins option
Slideshow (save slideshow as EXE/SCR or burn it to CD)
Show EXIF/IPTC/Comment text in Slideshow/Fullscreen etc.
Support for Adobe Photoshop Filters
Fast directory view (moving through directory)
Batch conversion (with image processing)
Multipage TIF editing
File search
Email option
Multimedia player
Print option
Support for embedded color profiles in JPG/TIF
Change color depth
Scan (batch scan) support
Cut/crop
IPTC editing
Effects (Sharpen, Blur, Adobe 8BF, Filter Factory, Filters Unlimited, etc.)
Screen Capturing
Extract icons from EXE/DLL/ICLs
Lossless JPG rotation
Unicode support
Many hotkeys
Many command line options
Many PlugIns
Only one EXE-File, no DLLs, no Shareware messages like "I Agree" or "Evaluation expired"
No registry changes without user action/permission!
and much much more