Q&A for How to Change DVD Drive Region Code in Windows 10

In some cases, a DVD player's hardware has its own memory that manages region codes. Perhaps this is the case with your device.

If you bought your PC used, there's a chance the previous owner changed the region multiple times. If it's new and unused, your OEM probably disabled this choice.

You should be able to change the region back to region 0 the same way you change it to region 1. If you reach the 5 maximum times to change your hardware region, you can't switch it back to region 0 anymore. If that happens, you will need to unlock your DVD player or convert the disc to region free with Winx DVID ripper or Makemkv.

Movie studios don't like it when people import DVDs from other regions. If they could get away with it, they would stop you from changing it at all. If a drive didn't follow these restrictions, it couldn't legally be called a DVD-ROM drive or play encrypted DVDs.

The region is stored in an EPROM on the drive itself. It's not technically part of the firmware, which is why updating the firmware usually doesn't change the region code or reset the counter.