Hey all, First time poster here. For those of you with short attention spans, there's a sumary at the bottom; feel free to skip ahead. I've been trying to solve this issue for an entire day. Okay, well... 4 hours. It feels like forever, though. Anyway, here's the deal: I just upgraded to Vista Home Premium. Apparently the upgrade advisor ...

I am running Vista Ultimate on my Toshiba laptop.  I am consistently unable to play DVDs or downloaded vids using Media Player 11; I receive an error message stating that MP cannot play the specified file because of a missing codec or an unknown file type.  This also happens, though not nearly as often, when attempting to view with Media ...