IF there are read erros in the first 2~5%, then it is SafeDisc. If there are errors around about the 97% mark, then it should be Ring Protech. If there are errors around Sectors 2000~12,500, the it should be ProtectCD-VOB. But 85%, if this happens everytime I would think there would be a lot of scratches or another error based protection or something. When reading, press tools/log to bring up the CloneCD log. See if any activity is in there while reading. Or just scan it with ClonyXXL, Yaps or A-Ray Scanner.