I hope your are facing problem in opening raw images from Nikon D800. If i am right then do as below given instructions to solve your issue:
You can open D800 files with Adobe Photoshop CS6 with the newest Adobe Camera RAW plugin version 7.4. Earlier versions of Photoshop (CS5 and older) can not be updated to the newest Camera Raw version and will not be able to open Nikon D800 .NEF files. You will need CS6 with the updated Camera Raw to open D800 .NEF files. For earlier versions, use the DNG converter.
You can convert D800 NEF files to Adobe Digital Negative Gallery (DNG) format using the Adobe DNG Converter version 7.4. After converting to DNG format, you can open .DNG files with earlier versions of Adobe Photoshop and other programs that can read DNG format.
Open D800 RAW (.NEF) files using Adobe Photoshop Lightroom 5. You can also use Adobe Photoshop Lightroom Version 4.4. Lightroom versions before 4.4 will NOT read the D800 RAW .NEF file. Lightroom 3 can not be updated to read the files. You must have the current Lightroom 4.x branch or use the Adobe DNG converter described above.
If you are facing another problem than above listed then fix it yourself with help of Nikon D800 Manual.Good Luck.