With OpenSSH Client installed by default in Windows 10 April 2018 Update, there should be no setup needed in Windows side. If you cannot run ssh client, scroll to bottom to check if OpenSSH client installed.
In Raspberry Pi/Raspbian side, you only need to enable Interface of SSH in Raspberry Pi Configuration.
This video show how to. The Raspbian desktop is the Raspberry Pi via VNC view. The Command Prompt is what we run in Windows side using build-in ssh client,
Check if OpenSSH Client installed in Windows 10.
Setting -> Apps ->
Select Apps & Features and Manage optional features
Check if OpenSSH Client included in the list.
If not, click the Add a features.