There's good and there's bad.
The good, is that video takes a good computer to do right.
You've already spent the money on that.
You also have a burner.
You only need good software to go with your hardware.
1.) You need capture software that will accurately read the movie, and convert it to a digital format on your computer. Intervideo will work, not the best, but still reasonable. Make sure you understand how the capture process works, so you can get an accurate copy. You're going to need to learn about aspect ratios, framerates, and what is dvd compliant.
2.) You need to capture into mpeg-2 format if at all possible. Intervideo should have that option. You need to know if you are using NTSC or PAL. If you don't know what that is, you have more reading to do, depending on where you live.
3.) You need something that will author the movie you captured into the right format for burning. There are good, and there are some truly horrible programs to do this. Again, windvd is in the middle here. (providing we're talking about Invervideo WinDVD Creator version 2.x or similar).
4.) You need a reliable burning program. Intervideo should also fulfill this, and although not the best, it's far from the worst.
I would suggest you let Windvd create the files on your hard drive, and NOT burn directly to disk. You can then test it in a good software player, before you burn.
Start reading the tutorials, you have a LOT to learn