Unfortunately couldnt make Hi P2P Client working, but at least the laptop is usable now: it took several seconds switching between tabs or copying text under mouse when it was running on windoze. Laptop is very low end specs (4Gb ram and some i3 cpu)
There are many other NVR options out there. Try Shinobi.
Also, check and see if that memory is upgradeable for cheap, and whether it has an HDD or SSD. May be worth switching that if cheap.