Hi esamo,
you could try to enable the H.264 encoding. It could be beneficial for both your first two questions, as it will provide higher quality and reduced encoding time, thus improving latency. You may consider the AVC Pack or installing the required codecs by hand. More info here:
https://www.nomachine.com/AR10K00706
As for your third question, virtual sessions on Windows are not possible at the moment, but such feature is certainly in our plans.