How do I connect my Computer to my TV to watch movies.?

I've hooked mine up through a VGA type cable (the type of cable that comes out of a computer monitor). I hook up my Apple iBook with a video out cable that runs to the VGA hookup on my TV (not all TV's have them, but most HDTV's do) and then it transfers the image from my laptop screen onto the full 42". It's awesome, especially for things like movies and youtube.

locate a s-video out or a RCA jack to plug into your computer and connect it to your TV. just make sure your video card has a TV-out capability

You need a TV-out on your video card. Some have S-video out ports near where the monitor is plugged in, some have a composite video (the yellow hookup) out port. If you have neither, I'm sure you could find something to convert from the monitor-in port on your computer's back to composite or S-video. Though the resolution would be much lower on a TV. (You'd also need to convert on your sound card the audio-out to the sound composite cables (red and white). You could get something like that cheap, though one with a long enough wire would be more expensive, as would be for the video wires. I think the best bet is a wireless media setup where your wireless network connection broadcasts video to a box connected to your TV. You could stream your videos directly. DSM-320 is a cheap model.)