CD DVD Drive not reading some discs

Hello,
I've been having trouble with my CD/DVD drive on my Toshiba Satellite, it has been reading some dvd discs but not others. Now I'm trying to install a game with 2 discs it read the first disc fine but then when I needed to insert the 2nd disc my drive wouldn't acknowledge it. Then it wouldn't read any disc at all. I have uninstalled and reinstalled the drivers and changed the registry keys which I have seen on a few forums. I thought it was a faulty drive but now have realised it will still run other discs of the same type as the ones it is refusing to see.

I have no idea what to do with it, any suggestions?