DNG Codec Version History. Build 6/6/ Generate correctly rotated thumbnails on XP Pro 64 and 32 bit Windows XP; Simplified install that picks correct version(s) for 32 bit or 64 bit Windows Preview DNG files in Windows Explorer on Windows Vista; Preview DNG images in Microsoft Photo Gallery on Windows Vista. May 17, · Thus, camera makers have been offering their own codecs to fill the gap since Windows Vista was released. Adobe's DNG codec for bit Windows requires Windows 7 Author: Stephen Shankland. May 20, · Adobe has published a DNG Codec release candidate on Adobe Labs. The DNG Codec provides a method for Windows 7 customers to view DNG files in the Windows Explorer and Photo Gallery. The codec allows thumbnail of DNG images been generated for preview in Windows Explorer. The Adobe DNG Codec supports only both bit (x86) and bit (x