I just reinstalled windows to fix some driver problems and now I have some avi and mpeg files that I can't watch with realone or windows media. They've worked before but now they say "An operation failed due to a certification failure" or "MPEG by Bitcasting: File Format cannot find MPEG file header. This may not be an MPEG file" I uninstalled realone then reinstalled, and did the same with all of my codecs and they still won't work. I can't seem to find any info on this problem.I Also tried g-spot but it says that there asf files and that the codecs aren't available. any ideas?