Have a look at FastPictureViewer codecs
FastPictureViewer Codec Pack 2.3
64-bit and-32 bit image decoders for Windows 7, Windows Vista and Windows XP SP3.
Enables support for 38 additional image formats in Windows Explorer, Windows Photo Gallery, Windows Photo Viewer, Windows Live™ Photo Gallery and Windows Media Center 7, all with full native 64-bit support, great file-formats compatibility and proven rock-solid stability and performance.
Supports raw formats from more than 320 digital camera models, including CR2, NEF, DNG and more, plus specialists image formats like EXR, TGA