File C:\Users\rav\AppData\Roaming\npm\sfdx.ps1 cannot be loaded because running scripts is disabled on this system. For more information, see about_Execution_Policies at https:/go.microsoft.com/fwlink/?LinkID=135170 code example

Example: AppData\Roaming\npm\react-native.ps1 cannot be loaded because running scripts is disabled on this system. For more information, see about_Execution_Policies at https:/go.microsoft.com/fwlink/?LinkID=135170.

Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy Unrestricted