Originally Posted by
ispano
If the "codecs" used were not installed separately by you, then they came with Windows or another program. Would first run SFC /Scannow and it should find any corrupted Windows file, if any. As for installing DivX, it might have installed it's own codec, and raised priority for it up in the list, but the codec cannot actually play the videos. Quicktime uses it's own codecs typically. I honestly won't touch DivX anything, if I need to convert for some weird reason, I use better tools.