Music and video play on laptop CD/DVD drive but not data files

Having dredged the internet, I came across this forum amongst the many with questions relating to cd drives working but dvd not etc, but my issue is slightly different, i think.

CDs seem to play ok, and so do DVDs, but I seem to have a problem with my laptop reading a disc with DS games on it that it used to read no problem. The discs can be used in my other half's laptop, so it is clearly a problem with my laptop.

I'd appreciate if anyone could advise where I can start to solve this problem
 
You need to have the CD/DVD drive replaced. Internal lasers fail in strange ways. The drives are not too expensive and they are easy to replace
 
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