If your CD player doesn't say "DVD ROM" on the outside of its drive it will never play DVDs, no matter how much software you add to your computer. In my case,I have 2 CD drives in my tower. The top one says "DVD ROM" on the disk drive. The bottom one says "Compact Disk-RW" on its disk drive.
Only the top one can play DVDs (and CDs) The bottom one can copy data and music onto a CD. It cannot copy a DVD.
You need to install a DVD drive.