Look up CDBURNERXP. It's not obvious how to copy YOUR DVD. But it's simple. Create the .ISO from CDBURNERXP, then write that from CDBURNERXP.
You were not specific about what YOUR DVD is, but I am only going to share how to duplicate YOUR DVD and not commercial copy protected DVDs.
I have a compaq presario notebook v2312us and the manuel does not state instructions on copying or burning. Any info would be greatly appreciated