I don’t believe uninstalling it will help as Sony’s codecs have already been over written. Codec packs are never a good idea. If there’s a specific one you need, find it and install it, not any packs. You may have to uninstall the pack and Vegas, re-install Vegas. It seems Vegas doesn’t like these files. Can you capture as mpg or something Vegas will work with? Did it come with any software that can convert the files to something more Vegas friendly? Can you open them with Windows movie maker and export to another file. .AVI is just a wrapper and can still contain unusable codecs in Vegas. John R, you know more about this than me. Got any other ideas?