1. Launch Settings
Click on start and then click Settings (COG Wheel)
2. Click Personalization
On the settings page, click on Personalization.
3. Click Taskbar
In the Personalization Section, click on Taskbar at the end of the menu on the left.
4. Toggle Switch On
In the middle move the slider right where it says "Replace Command Prompt....). Now right click on start and you will have PowerShell instead of Command Prompt.