I just upgraded the firmware on my DS-7608NI-E2 a couple of months ago to the latest at that time. It added some new features for me. I don't think Hikvision is supporting this model anymore with firmware improvements.
I also upgraded the firmware on my DS-7608NI-I2 with the latest software and there are some nice features with the updated firmware. One is I can now adjust the "shutter" speed on the cameras from the NVR. Also the day/night adjustments are also available through the NVR. Also a couple of others I cannot think of offhand. I hope Hikvision continues with these improvements.
Thanks for the info and the last reply, I saw it before but I have been working lots... So I started a new thread asking if I can just get a newer MB and replace my old one to have a newer model with firmware support