Ensure the firmware matches DS-7616NI-K2 exactly. Do not use firmware built for /16P (PoE) models or I-Series ( DS-7616NI-I2 ) unless the release notes explicitly state unified compatibility.
: Access the Hikvision UK & Europe Portal for the most stable and localized builds. ds7616nik2 firmware link
The official firmware for the Hikvision DS-7616NI-K2 NVR is available through the Hikvision Europe Portal Ensure the firmware matches DS-7616NI-K2 exactly
If you find a link, check your first.