Connect my laptop screen to tv?

All I am wanting to do is present my movies thats on my laptop, on my tv for my family to enjoy with me! Please help. I have a USB to RCA cable that I just bought offline. I have Windows 7 and my laptop has the projector thing where I can duplicate, extend, or projector only picture. I don't know if I have to... show more All I am wanting to do is present my movies thats on my laptop, on my tv for my family to enjoy with me! Please help. I have a USB to RCA cable that I just bought offline. I have Windows 7 and my laptop has the projector thing where I can duplicate, extend, or projector only picture. I don't know if I have to have some certain kind of software for it to work or something, but I know I just need help, and soon so we can have family night!!!
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