had exactly the same problem. something in the update went beyond the need for a simple driver update. Media player crashes after a few seconds and locks up the pc. Not found the root cause of the problem yet, but thought you might like to know that you're not alone!
Yes, I had thought I fixed the thing by reloading the original drivers and fixing a seemingly unrelated issue, something about running the console as administrator but my wife tells me that her pc still won't run media player.
I am beginning to wonder if the software for her mp3 player may be at fault now.
Anyway I am hoping the RC will fix this issue.