Microsoft announced a few days ago on a new update to its Camera Codec pack which enables the viewing of a variety of device-specific file formats in Window Live Photo Gallery as well as other software that is based in Windows Imaging Codecs (WIC).
The new version (16.4.1970.0624) includes support for several new cameras including the Nikon D7100.
Here is a full list of the cameras currently supported:
Canon: Digital Rebel XT, Digital Rebel XTi, EOS 10D, EOS 20D, EOS 30D, EOS 40D, EOS 50D Digital, EOS 60D, EOS 100D, EOS 300D, EOS 350D, EOS 400D, EOS 450D, EOS 500D, EOS 550D, EOS 600D, EOS 650D, EOS 700D, EOS 1000D, EOS1100D, EOS 5D, EOS 5D Mark II, EOS 5D Mark III, EOS 6D, EOS 7D Digital, EOS D30, EOS D60, EOS Digital Rebel, EOS Kiss Digital, EOS Kiss Digital N, EOS Kiss Digital X, EOS Kiss F, EOS Kiss X2, EOS Kiss X3, EOS Kiss X4, EOS Kiss X5, EOS Kiss X6i, EOS Kiss X7, EOS Kiss X7i, EOS Kiss X50, EOS M, EOS Rebel SL1, EOS Rebel T1i, EOS Rebel T2i, EOS Rebel T3, EOS Rebel T3i, EOS Rebel T4i, EOS Rebel T5i, EOS Rebel XS, EOS Rebel XSi, EOS-1D, EOS-1D X, EOS-1D Mark II, EOS-1D Mark II N, EOS-1D Mark III, EOS-1D Mark IV, EOS-1Ds, EOS-1Ds Mark II, EOS-1Ds Mark III, PowerShot G1 X, PowerShot G2, PowerShot G3, PowerShot G5, PowerShot G6, PowerShot G9, PowerShot G10, PowerShot G11, PowerShot G12, PowerShot G15, PowerShot Pro1, PowerShot S90, PowerShot S95, PowerShot S100, PowerShot S110, PowerShot SX1 IS, PowerShot SX50 HS
Casio: EX-FH20
Epson: R-D1, R-D1s
Kodak: EasyShare Z981, EasyShare Z1015 IS
Konica Minolta: ALPHA SWEET DIGITAL, ALPHA-5 DIGITAL, ALPHA-7 DIGITAL, DiMAGE A1, DiMAGE A2, DYNAX 5D, DYNAX 7D, Maxxum 5D, Maxxum 7D
Leica: DIGILUX 3, D-LUX 4, M8, M8.2, M9
Nikon: 1 J1, 1 J2, 1 J3, 1 S1, 1 V1, 1 V2, Coolpix P6000, Coolpix P7000, Coolpix P7100, D1H, D2H, D2Hs, D2X, D2Xs, D3, D3s, D3X, D4, D40, D40x, D50, D60, D70, D70s, D80, D90, D100, D200, D300, D300s, D600, D700, D800, D800E, D3000, D3100, D3200, D5000, D5100, D5200, D7000, D7100
Olympus: C-7070 Wide Zoom, C-8080 Wide Zoom, E-1, E-3, E-5, E-10, E-20, E-30, E-420, E-450, E-520, E-600, E-620, EVOLT E-300, EVOLT E-330, EVOLT E-400, EVOLT E-410, EVOLT E-500, EVOLT E-510, OM-D E-M5, PEN E-P1, PEN E-P2, PEN-P3, PEN E-PL1, PEN E-PL1s, PEN E-PL2, PEN E-PL3, PEN E-PM1, XZ-1
Panasonic: Lumix DMX-FZ40, Lumix DMC-FZ150, Lumix DMC-G1, Lumix DMX-G2, Lumix DMC-G3, Lumix DMC-G5, Lumix DMC-GF1, Lumix DMC-GF2, Lumix DMC-GF3, Lumix DMC-GF5, Lumix DMC-GH1, Lumix DMC-GH2, Lumix DMX-GX1, Lumix DMC-LX3, Lumix DMC-LX5, Lumix DMC-LX7
Pentax (PEF formats only): *ist D, *ist DL, *ist DS, K10D, K20D, K100D, K100D Super, K110D, K200D, K-01, K-5, K-7, K-30, K-r, K-x
Samsung: EX2F, NX10, NX11, NX20, NX1000
Sony: DSLR-A100, DSLR-A200, DSLR-A230, DSLR-A300, DSLR-A330, DSLR-A350, DSLR-A380, DSLR-A500, DSLR-A550, DSLR-A560, DSLR-A580, DSLR-A700, DSLR-A850, DSLR-A900, Alpha NEX-C3, Alpha NEX-F3, Alpha NEX-3, Alpha NEX-5, Alpha NEX-5N, Alpha NEX-6, Alpha NEX-7, Alpha SLT-A33, Alpha SLT-A35, Alpha SLT-A37, Alpha SLT-A55/A55V, Alpha SLT-A57, Alpha SLT-A65V, Alpha SLT-77V, Cyber-shot DSC-R1, Cyber-shot DSC-RX1, Cyber-shot DSC-RX100
Other Software,Post Processing Microsoft,Microsoft Camera Codec Pack,RAW LensVid