I have developed a playback problem with recording movies. Understand that they record well to play in my computer but not for a free standing DVD Player as with the TV. I get the message that "Playback not installed on this disk." I have new HP 840i dvd writer and the problem still persists. I have used Memorex, Staples, Sony, Verbatim, HP, and Maxell disks. I am using U-lead, A-One, Roxio 9, and Nero OEM Suite for DVD Writers as writing software. I developed this problem about 3 months ago gradually as i in 10 woul not playback , I'd be lucky if 1 in 10 will play back. I also have a new Panasonic DVD writer on my other computer with the same problem. HELP, if someone has a new idea for a solution. I have reloaded software including Windows XP and all other programs associated with this process.