Hi, I am having terrible problems while playing back video files. Whichever file type I play, Mpeg, Avi, DivX, or Xvid, I get really bad crackling on the audio. The picture is perfect and there is no sync problem. I have tried numerous combinations of Codecs and various different players. I thought at first that it was my soundcard but MP3 and WAV audio files play perfectly ( and, strangely, so do WMV video files). I installed NIMO CODEC PACK V 5.0 BUILD 7 (not a good idea, looking back). I have also tried removing all codecs that where not installed originally with Windows. Nothing I do seems to make any difference, apart from stopping the files playing at all. Any suggestions would be gratefully received. System Spec: 866MHz P3 512Mb Ram Windows XP Pro SoundBlaster Live! ATI Radeon 9000 64Mb Lite-on 48125s CDRW Pioneer DVR-104 DVD-RW All drivers up to date.