1. The DVD you are backing up contains errors such as scratches, fingerprints, etc.

2. The DVD is improperly authored and is not in a valid DVD structure or

3. The third party application you are using cannot read the DVD. Make sure the third party software you are using to remove copy protection is up to date. (Please understand DVD43FREE or any other freely available software found on the Internet are developed by independent third parties and are not distributed by, affiliated to or associated with ICOPYDVDs2. We cannot and do not provide support for these third party software products.)