update npm version in windows code example

Example 1: update npm-windows

powershell Set-ExecutionPolicy RemoteSigned
npm install -g npm-windows-upgrade
npm-windows-upgrade

Example 2: how to update npm version in windows

On Win10:
Run PowerShell as Administrator and sequentially enter commands:

Set-ExecutionPolicy Unrestricted -Scope CurrentUser -Force
npm install -g npm-windows-upgrade
npm-windows-upgrade