It's old an worn.
Here is your ATAPI DVD Dual 8X4X12:
http://www.cdrinfo.com/Sections/Reviews/Sp...?ArticleId=9283
You can try giving the laser lens a good cleaning and if you can find a firmware update, you may have better luck but for 25 bucks or less, you could have a new one.
Just because you are using Memorex and your friend gave you a Memorex disc does not mean that they are the same.
Your memorex is labeled as Disc ID: RITEKF1.
What does the disc that your friend gave you say?