if it matters this is the first time i have had trouble with this type of error, i just finished backing up over 20 movies from my parents collection last week, and today i got a weird error except i am backing up an iso. i ripped the iso from dvd decrypter, and it said opperation finished successfully. then i try to burn and it gives me a "Check Condition Error, Cannot Write Medium" then i try burning the file with Nero and it says "Could not perform start of Disc-At-Once" im stuck, i have no clue why this is happening, maybe a bad rip? ive tried ripping it several times and it says completed successfully, and ive tried burning just the mds file and then the whole image with the same error, please help me guys!!!