Sounds to mee like you have enough computer to handle the job. Emeric may be correct in his statement. Try a different brand of media. I buy the 20 pack Verbatim 8x. At SAM's Club they cost $20.00. With my computer the higher (x) speed seems to help. No error messages, and no rejects. Every time That I have tried to use those disk that are packaged on a spindel I end up with about 1 out of three that is N.F.G. You ain't gottaa clue as to how pissed that makes me.. Guess that's why they call me GRIZZLY.