|If you got it in Japan and you are attempting to play a movie I would guess the issue is the drive is set for a different region than you current reside in.|
You need to reset the region to the location you currently reside in. You can do this up to 5 times total.
View the link below for help with that.
You may also need to install a third party player and codecs.
If that is NOT the issue because you are using DATA DVDs then you may just need to select the autoplay options.
Go to Control Panel> Autoplay to select the type of disks to play. You can check the box to use Autoplay for all or pick and choose.
message edited by OtheHill