Does ASUS optical disc drive support changing region codes?
There is a region limitation for optical disc drive, only media that are in the same region can be read.
All ASUS optical disc drive have locked region code.
You can modify the region code for up to five time for each optical disc drive. Then you may not change it again.
How to get the (Utility / Firmware)?
You can download the latest drivers, software, firmware and user manuals in the ASUS Download Center.(LINK)
If you need more information about the ASUS Download Center, please refer this link.