After I installed the K-Lite Codec pack, I sometimes get this Avi Chunk Viewer window at the most annoying times possible. It seems this is caused by a codec called Avi splitter. It pops up when there is an avi found with an incomplete footer.
To remove the Avi Chunk Viewer, do the following:
1. Start the K-Lite Codec Tweak Tool, located in the K-Lite\Configuration start-menu.
2. Go to the Disable part, and select Avi Splitter.
That's it. Although you might have to reboot your computer.