I've read a lot of threads on this site, and everyone on here was amazingly knowledgable. Thought I'd throw this out there to see if anyone has any ideas. I purchased a Pacific Digital DVD Burner from Sam's. It worked fine at first but has since been able to burn anything. When I hook it into my computer (Sony Vaio NV170) or my Thinkpad, it can "see" that the DVD Drive is there but cannot read ANY disks. (I have tried successfully burned disks, movies I have purchased, CD's, and nearly everything I could think of. It shows them as blank and says, eventually "Windows cannot read from this disk. The disk might be corrupted, or it could be using a format this is not compatible with Windows." Thank you for ANY help you can provide!