If you need information about WIC (Windows Image Component), we recommend to read the Wikipedia article.
If you have a DSLR digital camera such as Canon, Nikon, Sony, Panasonic and you are shooting in RAW format, an appropriate WIC codec is required to read those RAW files.
You can check with your camera manufacturer if they offer a codec for your model.
As a simple solution we recommend the Fast Picture Viewer Codec, which will not only allow you to read most RAW files, but also to optimize read speed and image orientation of JPEG thumbnails in Windows.
Buy FastPicture Viewer WIC Codec, which will read most photo formats and also fix the JPEG rotation in thumb view of Windows Explorer. Supports all Windows version from Windows XP SP3 to Windows 10 (32 and 64 bit).
Microsoft Camera Pack is a free alternative from Microsoft to support new digital camera formats (such as Canon, Nikon, Panasonic, Sony etc.) in your photo editing software. Supports Windows 7 and Vista (SP2).