Encountered such a problem, the way to deal with is not necessarily fixed, you can check the computer is not installed video player system with the MediaPlayer decoder is too little to read your DVD video files you'd better install a decoder-wide software such as Storm video or something.
Well, then, from my Computer, right-click, select Run. If it doesn't work, it's a hardware problem.
I do not know you can not play the question of what is the specific?
If the optical drive does not respond to the inserted disc, there may be a problem with the drive, and you can try reinstalling the drive.
If the CD drive reads a disk, but the read fails, or if you insert the disc into the drive, it may be a problem with the CD drive itself.
What is the format of the disc that can't be played? You can try to play the music CD, CD-ROM,VCD, if you can not read, you determine the CD-ROM problem.
Of course, if you want to play the disc quality is not high, or your CD-ROM drive compared to pick a plate, you may also appear unable to play the situation.