[TheCrimsomBlade]

Did the game come with A CD key? that is the only way you will really know if it is boot leg or not. When you try to regester it with Bioware in order to be able to play on line it must have a valid CD Key. If it is a stolen CD KEY or an invalid CD Key you will find out at that time. IF it is the latter you will never be able to play on line with that version of HotU.
So try to regester the CD KEY and see what happens. If it is already regestered contact the original owner Via Bioware NWN home page to see if he sold his game without unregestering his game. If he did sell it have him unregester his version and then you'll be able to regester HotU in your Name and it will then be a legal copy for you to use and enjoy. If he still has his copy and has not sold it. You have a Bootleg with a stolen CD Key you need to get in touch with Bioware and let them know where you got the game and from whom you got it. They have stated that if you receive one of these Bootleg copies that there is a reward for any and all imformation they can use to catch the boot leggers.

GOOD LUCK!
Who knows, it still has a chance at being a legal copy but you'll never know until you Try to regester the Key.