Actually, when you try to play video via Windows, you will have to set a Region Code for most optical drives. Depending on the model, you can only change so many times before a setting becomes "permanent". This can sometimes be overcome by a firmware update for the optical drive itself.
There are some models around (see below) that are "region free". How many regions are you trying to accommodate?
http://www.amazon.com/External-Region-Burner-Drive-Player/dp/B005QJLT7S