I'm getting very frustrated right now. I'm using a quadcore windows 7 machine. I hadn't had problems until just recently. I had just burned a disc that gets read and still can be read. Now I have tried to burn videos files twice at the slowest 4x speed using Express Burn software. I burn as a Data BD-R. I left the file system alone, at ISO+Juliet. Other options are "Hybrid" and "UDF". The first one I made at the same default works fine. The latter two BD-Rs burn successfully but won't read. ISOBuster notices the file but says something about an ISO9660 Error 3.

Can anyone help me with this problem? I'd greatly appreciate it. One thing I'm wonder is if when I load a blank disc windows asks if I want to use it as a USB like device (Live File System) or mastered. I check the mastered option and close it and then burn with Express Burn.