The j2k-codec.dll file is part of a codec from j2k-codec.com. A codec, short for coder-decoder, is a program that translates data into a format your system will understand. Certain videos and images are encoded using special codecs to improve the quality of some aspect of the video. This codec translates j2K or JPEG 2000 files for your computer. If you have the codec on your computer, you can view files that use j2k. If this file and the codec are missing, the files will not show up on your system.
Your system is made up of lots of files that work together to run programs and display information. The Windows registry keeps track of files on your system and makes sure they work and play well together. If a piece of a program is missing, the registry will give you an error. To prevent and fix errors, run ZookaWare PC Cleaner regularly. ZookaWare PC Cleaner will find and fix all registry errors on your machine, guaranteed. Clean your registry with ZookaWare PC Cleaner.