K-Lite Codec Pack
Play all the popular movie formats and even some rare formats.
I haven’t installed any codecs on my notebook other than divx and so far I have been able to play all my downloaded tv shows. On my old notebook I dd have k-lite codec pack installed and so I am interested to see what videos don’ t work before I install k-lite. But, if you are having trouble getting the right codecs then check out k-lite codec pack.