It seems everyone is sorta chasing the same rabbit on this one: that somehow ANYDVD or a conflict with other software is affecting the region code setting negatively.
I have seen that exact window pop up about 1/2 a dozen tymes, and originally I thought it was my burner was producting defective discs...but wait, they play on the set-top players...just not on the PC? (I still havent figured out why that is, gave up searchin).
I finally came to the conclusion that indeed, I have some issue with 1 of my 2 DVD drives. The burner is a toshiba...the reader is a sony (It was a gift or Id have gotten something better with bad sectors). I saw that error WAY LESS if I used the burner as reader also, and I dont see it AT ALL if I play the discs back in another machine (Hitachi reader only, no burner).
WHat thats telling me is it IS in fact a hardware problem (on my machine) with its ability to READ the discs compared to other machines/devices. (Yes, I uninstalled anydvd, powerdvd, everything else that could access the drives). AFter experimenting on and off for weeks, updating firmwares, etc...I shelved the wonderment and just presumed that 1 or both my drives are slightly flakey. DVD-R Discs made on my brothers machine (NEC burner) do not cause the error when reading on my machine. Discs made on my machine are VERY SLOW to boot in his machine(Drive takes quite awhile scanning before it FINALLY recognizes the DVD), but eventually read OK, and on my machine they may or may not pop up that identical error box. FOr these and a variety of other quirks...I believe its A DRIVE issue...not with region as is being chased in this thread, but with the physical quality of the data it writes to the disc...its making it "unrecognizable"...which the error may see and report the same as unreadable data even though the optics picked the data up fine...Windows couldnt figure out what it had seen and it had to say SOMETHING?
We believe anyway. Could be wrong, but hey...mistakes are how we learn...