Hello,
Thank you for posting your query on Microsoft Community.
As per description, you are getting error message while changing dvd regions.
I would appreciate if you can provide us the following information to help us understand the issue better:
- What is the model of your system?
The region can only be changed five times, before its set permanently.
How do I change my DVD region?
DVD movies are encoded for different world regions, and your DVD-ROM drive must be configured for the appropriate region in order to play the DVD.
If you have DVD-decoder software installed on your computer, you can usually change the DVD region setting in the DVD decoder program. Follow the instructions in the program's Help file for changing the DVD region setting.
You must be logged on as an administrator or be a member of the Administrators group in order to change the DVD region.
Note that the DVD region for most DVD-ROMs can only be changed up to five times, and the number of changes still available is located on the DVD Region tab. If the tab shows that you can only change the setting one more time (Changes remaining = 1), you won't be able to play DVDs that use a DVD region that is different from your last selection. If you run out of opportunities to change the setting (Changes remaining = 0), contact your DVD-ROM's manufacturer to reset this value.
Also install DVD decoder as an issue with codec or DVD decoder could even cause the issue with DVD region code.
http://www.microsoft.com/windows/windowsmedia/player/plugins.aspx
I would also suggest you to download and install the latest firmware for the CD/DVD drive from the manufacturer’s website and check if it solves the problem.
Hope this information is helpful. Please do let us know if you need further assistance with Windows, we’ll be glad to assist you.