Change MTU in Windows

In rare cases you need to change (or "fine tune") your MTU.
Magic NETSH is able to solve the task.

1. netsh interface ipv4 show subinterfaces
(determine the label of your interface)

2. change its MTU
netsh interface ipv4 set subinterface "interface_label" mtu=50 store=persistent

That's all (thanks Max Chubin for the idea)