오류가 나는데 왜그럴까요?

express : File C:\Users\KimHyeok\AppData\Roa

ming\npm\express.ps1 cannot be loaded becaus

e running scripts is disabled on this system

. For more information, see about_Execution_

Policies at https:/go.microsoft.com/fwlink/?

LinkID=135170.

At line:1 char:1

+ express --ejs myfirstmap

+ ~~~~~~~

    + CategoryInfo          : SecurityError 

   : (:) [], PSSecurityException

    + FullyQualifiedErrorId : UnauthorizedA 

   ccess