I don't know your drive, but its usual that you can change the set region for a number of times - usually up to 5, and the drive stays with the last one.
you don't say the windows version you use, as they also are different - the O/S also can control the region code.
Drive wise, you have some turnarounds, either via firmware (take care!) or using some software in the market that can make it almost region free
but, as you say you were playing region 1, look at the legal side of your options.