Step 1: Enter NVR Username and Password.
Step 2: Click “Login”.

Step 3: Click “Configuration”.

Step 4: Click “System”.

Step 5: Click “Maintenance”.

Step 6: Click “Online Upgrade”.

Step 7: Click the check box to automatically upgrade the firmware if there is a new firmware version.
Step 8: Click “Check Upgrade”.

Step 9: If a message appears as shown in the image, it means that your NVR's firmware is the latest.