New firmware is not a silver bullet. After updating your cp-unr-4k2161-v2 :

Disclaimer: Firmware flashing carries inherent risk of bricking your device. The author assumes no liability for data loss or hardware damage. Always verify files with an antivirus before transferring.

Over time, minor software bugs can cause random reboots, UI lag, or HDD recording errors. Firmware revisions resolve these underlying code flaws to ensure 24/7 uptime. How to Locate the Right Firmware

Once your CP-UNR-4K2161-V2 has rebooted after a successful firmware update, several verification steps help ensure everything is working as expected.