I just reinstalled Windows XP this afternoon. I installed the most recent versions of XP Codec Pack and Winamp. Now, the vast majority of my videos won't play in Winamp, and those that do often have sound problems (or no picture but ok sound) that didn't happen before. Windows Media Player seems to play everything fine. This makes no sense to me since Winamp was playing video just fine before I reinstalled. What should I do?