Lỗi: "npm : File C:\Program Files\nodejs\npm.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. At line:1 char:1 + npm -v + ~~~ + CategoryInfo : SecurityError: (:) [], PSSecurityException + FullyQualifiedErrorId : UnauthorizedAccess"
lỗi quyền truy cập chưa cập nhật
Sửa: 
1. Chạy PowerShell Run as Administrator, rồi nhập: Set-ExecutionPolicy RemoteSigned
2. Y → Enter