green dots on screen--solution

[adicoto]

That is why nobody here on this forum don't reccomend codec packs. In fact most of us advise not to use them. I've seen how much bad can do a codec pack to Windows itself. Uninstall one and nothing work any more. You may even get to reinstall windows. So, depending on computer configuration, pre-installed codecs and so, you get different things with the same codecpack. And when they are released, some of the filters\codecs included are outdated.
Today some XviD encoded movies require at least XviD 1RC4 to be played. Older versions don't decode any more. So, try to keep updated with codecs, not with codec packs.