The Microsoft Camera Codec Package allows you to view a wide variety of device-specific file formats.
For example, the RAW format is supported for displaying the raw data of many important camera manufacturers in Explorer.

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Microsoft camera codec package

The Microsoft camera codec package extends the system to include the display of a variety of device-specific file formats in Windows Live Photo Gallery and other software based on Windows Imaging Codecs (WIC).
By installing this package, supported RAW camera files can be viewed in Windows Explorer.
This package is available in both x86 and x64 versions.

Supported device formats:

• Canon: EOS 1000D (EOS Kiss F in Japan and the EOS Rebel XS in North America), EOS 10D, EOS 1D Mk2, EOS 1D Mk3, EOS 1D Mk4, EOS 1D Mk2 N, EOS 1Ds Mk2, EOS 1Ds Mk3, EOS 20D, EOS 300D (the Kiss Digital in Japan and the Digital Rebel in North America), EOS 30D, EOS 350D (the Canon EOS Kiss Digital N in Japan and EOS Digital Rebel XT in North America), EOS 400D (the Kiss Digital X in Japan and the Digital Rebel XTi in North America), EOS 40D, EOS 450D (EOS Kiss X2 in Japan and the EOS Rebel XSi in North America), EOS 500D (EOS Kiss X3 in Japan and the EOS Rebel T1i in North America), EOS 550D (EOS Kiss X4 in Japan, and as the EOS Rebel T2i in North America), EOS 50D, EOS 5D, EOS 5D Mk2, EOS 7D, EOS D30, EOS D60, G2, G3, G5, G6, G9, G10, G11 , Pro1, S90
• Nikon: D100, D1H, D200, D2H, D2Hs, D2X, D2Xs, D3, D3s, D300, D3000, D300s, D3X, D40, D40x, D50, D5000, D60, D70, D700, D70s, D80, D90, P6000
• Sony: A100, A200, A230, A300, A330, A350, A380, A700, A850, A900, DSC-R1
• Olympus: C7070, C8080, E1, E10, E20, E3, E30, E300, E330, E400, E410, E420, E450, E500, E510, E520, E620, EP1
• Pentax: (PEF formats only): K100D, K100D Super, K10D, K110D, K200D, K20D, K7, Kx, * is D, * is DL, * is DS
• Leica: Digilux 3, D-LUX4, M8, M9
• Minolta: DiMage A1, DiMage A2, Maxxum 7D (Dynax 7D in Europe, α-7 Digital in Japan)
• Epson: RD1
• Panasonic: G1, GH1, GF1, LX3