To end this thread, I'm sure it's a checksum thing. Today, I installed a Pioneer DVD burner, and the same "checksum-failure" occured. I've tried to burn files (and copying them back gave no errors) or to copy a DVD (4,7GB) and no problems... End of story. I won't use the checksum check. Thanks for your help ;-) Regards, Patrick _______________________________________________ No banners. No pop-ups. No kidding. Make My Way your home on the Web - http://www.myway.com