ng.ps1 cannot be loaded because running scripts is disabled on this system. For more information, see about_Execution_Policies at code example

Example 1: running scripts is disabled on this system

=>run powershell as administrator
=>run foll command
get-ExecutionPolicy
=>if restricted; run following command
set-ExecutionPolicy Unrestricted
=>and set to all
=>again check by foll. command
get-ExecutionPolicy
**it will get unrestricted and problem is solved**

Example 2: \ng.ps1 cannot be loaded because running scripts is disabled on this system.

Set-ExecutionPolicy -Scope "CurrentUser" -ExecutionPolicy "RemoteSigned"

Example 3: ng : File C:\Program Files\nodejs\ng.ps1 cannot be loaded because running scripts is disabled on this system.

Run this command on your VScode integrated terminal: 
Set-ExecutionPolicy -ExecutionPolicy Unrestricted

Example 4: cannot be loaded because running scripts is disabled on this system

PS C:\> Set-ExecutionPolicy RemoteSigned