Jim, I guess we crossed posts. That is exactly what I did and got the same results. The Xp and Win 8.1 Pro computers have entirely different processors, motherboards, audio chips, anti-virus software and programs. Since it acted the same on both computers I have uninstalled it from the XP test platform. I just hate to spend the $50 plus to get a new Video Capture device from Roxio but I have eliminated everything else. The Plextor PX-M402U is working fine on the XP with its software but that computer does not have the burn capabilities that the 8.1 computer does (Blu-Ray) and the PX-M402U does not have win 8 drivers nor does the Roxio NXT2Pro recognize the device. I have asked Plextor forum if anyone has an 8.1 or win 8 device driver for the capture device but the only one I could find out there was for Win 7 and people were having problems with it since it is a 32 bit driver. My 8 machine is 64 bit so I did not see much use in downloading the latest Plextor driver and trying it. So that is where I stand right now.