After a year of recieving LoD from my friend I finally started playing it again. After reaching Act 5, I come across the second to last mission when my game locks ups at exactly the same spot!!! So, I unstalled it and re-installed only to find out I have a "bad data file" on my LoD disc. But's its not a total loss, I already backup my character. So she's ready to go. Do you think I have to buy a new disc or it might have something to do with my computer?