By saying it has no audio do you mean it doesn't play sound files or do you mean that your porn videos don't have sound? If you're watching porn and it doesn't have sound, you might need a new codec. Try opening the porn in Windows Media Player to see if it downloads any new codecs. If it tries to download a codec but can't, go to "Control Panel" then "Internet Options" then the "Security" tab. Set the security for internet zones to be "medium". Try to run the porn again and see if it downloads the needed codecs