After having formatted my PC, and having installed WMP 9 stright away, I cant seem to get any picture with the WMV MPeg 4 files. I have got K-Lite Codec Pack , the most recent one, installed, but no difference. I have tried Nimo Codec pack, the latest one, and though this does work, after playing any other video file after a MPeg 4 file, the mouse pointer gets messed but, all blurry. Closing WMP does the trick. I have since then uninstalled the codec pack. I then installed Ace mega codec pack, the most recent, and that gave me upside down pictures on the MPeg 4 files, but no problem with the rest. I have unistalled this now. Any answers to how I can fix these problems???