I went to watch a commercial DVD, on my computer using PowerDVD, and when the program started it bleeped and then hung. I tried it several time with different DVD’s and the same result. I haven’t done anything or installed anything new since the last time I watched a DVD. I did uninstall and reinstall PowerDVD and that did not work. Anyone have any suggestions. The version of PowerDVD is 4.0 and it came with my Sony DRU500A.