i am useing a liteon dvd burner, it had been doing a great job burning movies until last week. i am using nero, and i also use. 1 click copy dvd. Now bboth will not copy dvds. They burn about 30 percent, and i get write error,and burn error on both. i have uninstalled and reinstalled software, it does no good. it burns cds, no problems. i was told i could have picked up a virus in software, i don't downlaod music or movies from the internet. Burner is about 9 months old.