問題描述：
今天無法啟動intelliJ系軟件pycharm，經研究是端口問題。
目標端口未被占用但發現被保護
解決hyper-V開啟導致的端口問題：
方案一：
From https://github.com/docker/for-win/issues/3171#issuecomment-459205576
the workaround worked for me, the steps are:
Disable hyper-v (which will required a couple of restarts)
dism.exe /Online /Disable-Feature:Microsoft-Hyper-V
When you finish all the required restarts, reserve the port you want so hyper-v doesn't reserve it back
netsh int ipv4 add excludedportrange protocol=tcp startport=50051 numberofports=1
Re-Enable hyper-V (which will require a couple of restart)
dism.exe /Online /Enable-Feature:Microsoft-Hyper-V /All
when your system is back, you will be able to bind to that port successfully.
方案二：
重啟電腦並立即開啟目標軟件也可以解決。