Several forum users have made us aware of problems with the latest v4.30.005 firmware, not everyone seems to be experiencing problems and the linking factor between those experiencing issues appears to be that they had updated from the old v4.21.005 firmware. This firmware was made public late last year on the Hikvision portal but then swiftly removed as Hikvision said that the K-series were not designed for and could not properly support the full v4 firmware, which was why they have now...
Issue with Latest K-series v4 E-UI Firmware when Updating from v4.21.005 Firmware
Issue with Latest K-series v4 E-UI Firmware when Updating from v4.21.005 Firmware