I'm slowly working my way through dozens of TV recordings on DVD +R discs ..... all Philips discs recorded on a Philips DVD recorder. When I load them into my PC and select PowerDVD to review them, 2 out of every 3 cause the software to hang. You sometimes see the menu (created on the Philips recorder) before it hangs, other times the PowerDVD window goes black and then hangs. Only ejecting the disc brings it back to life again. All the discs are finalized and there is no obvious difference between those that work and those that don't. Any ideas ?