netsh interface tcp set global autotuning=disabled disable auto-tuning
netsh interface tcp set global autotuning=highlyrestricted
netsh interface tcp set global autotuning=restricted
netsh interface tcp set global autotuning=normal this is the default
netsh interface tcp set global autotuning=experimental allow super large windows, if your router has problems as it is, this would make it worse.

netsh interface tcp show global shows current state