This WILL NOT work on a Vista 64 machine. Confirmed via LG technical assistance, and my own personal experience. I was told by the techy that I would have to physically remove the drive from my pc and place it in a non-64 bit environment in order for the removal tool to work properly (which I am not going to do), or just live with it. Apparently, LG is not the innovative company that I had previously imagined, that they cannot calibrate a simple tool for use by ALL of their customers.