When testing latency in LatencyMon do I need to test it in games or just in desktop? Everything was fine when I surfing, listening to music but when I entered game I got this:
https://imgur.com/a/BWsto
https://imgur.com/a/BWsto
You should just test the system, with nothing running. If you see spikes then, you got issues.
If you got some stuff running, that could skew the results, as you can see in your pic.