The KB article 314060 is only if your drive is missing or not recognized. It
does not apply in your case.
I suspect that either the laser is failing or it needs cleaning. As you
mention, you are able to load CD-Rs that you burnt previously. Do audio CDs
work? How about other DVDs? By 'work', we mean that you are able to view
files in the drive via Explorer or My Computer. If the CDs work in other
computers but not yours, it is very likely a laser or wear and tear problem.
If they are quite old, they may need to be replaced.
Singapore Computer Home Remote On-Site Repair Service
Video Conversion VHS Video8 Hi8 Digital8 MiniDv NTSC PAL