First here's my specs first: \nOS: XP 64\nMotherboard: GA-970A-DS3P (rev. 2.x)\nCPu: AMD FX 8320e @ 3.5Ghz\nRam: 8GB DDR3 1600 Mhz\nHDD: 1TB WD 10,000 rpm \nVideo: Ati 4850\n\nOn this setup I installed the matsushita panasonic driver and I was able to play Blu rays fine for years using Macgo Bluray player for windows. Now for a few months I didn't watch any blu rays. Then I bought an anime series and I can't play it. In fact I can't even see the files on my computer either like I was able to in the past. Here's what's weird. I have an external usb bluray player and I plug it in and I'm able to see the files on my computer and play the episodes with Macgo. The problem is only with the 2 sata drives. I would thing maybe they can't read blu rays anymore. But I have this system dual boot with Windows 7 and they work fine on Windows 7. So at one point those 2 drives lost the ability to read blu rays on Windows XP specifically and I don't know why.