Thanks for your reply & suggestions. Yes, it is a new pc, about 3 wks new, so nothing much on it, yet. As far as anything installed that are video related would be AC3 (file 0.6b), DivX (22.214.171.124), VLC (2.1.5), and Acer Video Player (1.00.2005.0).
Earlier, I downloaded GPL MPEG 1/2 Directshow Decoder, which stated on several sites that it would specifically resolve this issue, but it didn't so, I uninstalled it.
Got any other ideas?