Creating a new thread since there wasnt one.

Anyway, my problem: I just finished formatting my PC, installed new video players, but now nothing works the way it did before. Tried watching the second episode of Uchuu Kyoudai, but itīs one giant mess of artifacts, stuttering and plain refusing to play the video.

Would someone be so nice and tell me which player and which codecs I need to enjoy anime these days? Thanks a lot!