Yea, this is a known Windows flaw that they fixed in
AnyDVD, so, either the fix isn't working correctly on some drives, or something else is causing the issue. Definitely let Slysoft know (give them your drive and firmware info and any other pertinent info plus reference this thread) and see if there's anything they can do. Who knows, maybe they'll be able to find the problem and fix it. At the very least they should be able to give you more info on what's going on. Good luck guys!