I have old videos that were converted digitally from 8mm. They are MPG files. When I try and copy them to a drive and then transfer them to another computer, the audio is messed up. It's almost gone, but there's still that hum that you get from these older videos, but the rest of the audio the people talking and stuff is gone. I've tried to convert the file once transferred to mp4 which didn't work. I tried to find Microsoft's Fix It tool, but it feels like that's been discontinued?? I think I need a CODEC or a way to uncorrupt the files, but I'm not sure how. Also It happens every time I try