NP.. Like I stted.. KLite updates once a month with the latest codec versions..
In Windows Vista or Windows 7, you want to use either the Vista Codec package or Windows 7 Codec Pack from Shark007 website.
on 64 bit systems, make sure to get the 64 bit tools.
For optimal performance.. I usually disable the FFDirectShow Video and Audio (set in the FFDirectShow config panel to not start / use with Media Player)
This way most videos will use DivX or XVid codec for playback.. usually DivX.
In Windows 7 with Media Player 12, DivX is built in to Media Player.. I am still looking for a way to update the DivX codec as the DivX codec can cause some system problems.. Shark007 does not alter Media Player native environment, as such will not update DivX unless DivX is not present.
I think the new DivX installer from the DivX company works with Windows 7, but I have yet to test it myself.. Think I will do that now.
Edit : checked for updating Windows 7 DivX content.. Windows 7 already comes with the latest DivX codec (DivX 7).