One day I just turned on my lap top and they were all gone (XVID, Lagarith Lossless Video Codec, etc...)
I've tried re-installing each codec and re-installing the programs that use these codecs.
Last things I can remember installing before the codecs disappeared are Ulead Video Studio 11, and some drivers
to make Easycap work on Windows 7. I uninstalled both Video Studio and the drivers but the codecs still don't show in the programs they use to.