How old is the computer? You need a modest computer to process a DVD. In 1999, I got a bargain bin computer from Staples for 1,000 dollars. It was old enough to still have a 3.5 floppy drive. About 4 years later I got a DVD rom as a christmas present. It installed easy. Was a simple matter of removing the plate and sliding it in, then plugging the wires together at the black clips. That was the easy part. Getting a DVD to play any better than a slideshow was the hard part. Even with all background programs shut off, it was still choppy. If your computer is old enough to not even have a DVD player built in, you might have a hard time getting acceptable performance adding one now.