I have seen this comment on another post "Be aware - upgrading to the 4.x firmware has been quite troublesome for some, due to corrupted configurations no longer allowing login. The NVR becomes unuseable."
Which software firmware is the best to upgrade to?
Updated 20-2-19 - corrected the link to the portal as Hikvision changed their url (again). Otherwise all is good. We use this method every day. Now viewed over 38,000 times. Here's how to upgrade your HikVision camera or NVR to the latest firmware version in just nine simple steps: Step 1...
The correct firmware versions are linked above, but in future, if you need to locate new firmware you can use this guide:
Finding the Latest Hikvision Firmware for your NVR Find the correct firmware for your Hikvision NVR with 3 easy steps: With this Post open on your PC, please press CTRL + F on your keyboard (Command + F on a Mac) Type in your NVR's product code and press ENTER to search Click on the link in...
(at this very moment the Hikvision portal appears to be down, we will contact Hikvision support and get an explanation for this and let you know)