The application’s version necessary to open the file is not correct.
You do not have an appropriate application installed that supports NRG file extension.
If you are not sure if the above problems concern you, you should consider other frequent irregularities:
Repair file’s associations with programs in the system registry.
Check system registry from the angle of hidden errors.
Scan computer in order to identify, repair and open the NRG file.
That is why, in the first place it is recommended to: The problem that often causes damage concerning NRG extension are Windows system registry errors. What are the reasons of errors concerning NRG extension of files?
Click “Start scanning” and wait until the programme performs the scanning process on your computer.
Download Malware/viruses removal tool from NRG files in the Windows system.
How to check if a file we want to open is not infected by malware or viruses?