If you enter the setup and download any updates via LiveUpdate after all you still have problems playing some movies, go back to the LiveUpdate and click "Advanced":

and manually select all codecs (ALLPlayer will download them again), then click "Download now".

Now you have all codecs, and all conflicts between them resolved, and virtually all of the movies should work without problems.

Codecs downloaded this way are available only for ALLPlayer and won't cause conflicts with other installed codecpacks