Try to avoid this crap as far as you can. I've used this codec for couple of years on many computers and I thought that mov files never will be played fluently. And when I uninstalled this codec then I got flash of insight.
Media Player Classic with ffdshow is enough to play mov files. 100 times better then Quicktime Alternative. Now I don't know for what this codec is developed. It does nothing beside spoiling playing mov files.