Hi, I'm having trouble installing a tuner for my media center. I would like to watch TV on my PC but when I try to scan I get the message that I don't have a tuner. It was OK before and I have installed the same drivers. Where can I get a driver? I thought I had installed the Avermedia driver for Sony Vaio VPCL138FG. I have windows 8 64bit but if I keep having this trouble I'll go back to 7, which I loved. Thanks!