Nikon has posted NEF Codec Version 1.12.0
1. Supports NEF (RAW) images taken with the Nikon 1 J1, Nikon 1 V1.
2. Supports 64-bit versions of Windows Vista and Windows 7.
If thumbnails for NEF files fail to display correctly in the Photo Gallery or Photo Viewer for 64-bit editions of Windows Vista and Windows 7, perform a disk clean-up as described below.
1. Right-click the system drive in Computer and select Properties.
2. Select Disk Cleanup in the "General" tab.
3. Select Thumbnails in the "Disk Cleanup" tab "Files to delete" list and remove the checks from the other items.
4. Click OK to start the disk cleanup. When the "Are you sure you want to permanently delete these files?" prompt is displayed, click Delete Files.
* Click here
for more information.