Reminds me of that GI Joe cartoon, where the guy goes to the kid and says "Hey! Kid! I'm a computer! Stop all the downloadin'!"
In all seriousness, this is a problem you simply can't run away from. The fact is, her behavior is causing tension between you two, and distancing you two from each other. Your best bet is to take time away from your computer time and her TV time to face this head on and explain to her the old saying, "Don't believe everything you hear on TV." and that Dr. Phil's and Oprah's messages need to be taken with a grain of salt. More importantly, emphasize how this is deteriorating your relationship with her and remind her there was a time she was a teenager, and ask her, is this the relationship she'd want with her mother? Hopefully, if she isn't too close minded, she will listen.