Do not refresh the browser, disconnect cables, or power down the machine. The process typically takes 3 to 7 minutes.
Unzip the file (if required) and copy the .bin file to the root directory of your USB flash drive. Insert the USB drive into the USB port on your NVR.
The best source is always the manufacturer of the device that uses the CPUNR4K2161V2 chip (e.g., router, security camera, or IoT controller brand). Navigate to the manufacturer's website. Go to the or Downloads section.