// execute in windows powershell:
Set-ExecutionPolicy -ExecutionPolicy Unrestricted -Scope CurrentUser
// answered in https://github.com/vuejs/vue-cli/issues/3424#issuecomment-567530758 by Hooponopono
vue : File C:Users{USER_PROFILE}AppDataRoaming
pmvue.ps1 cannot be loaded because running scripts is disabled on this system.
Simply go to the file (vue.ps1) and delete it. Worked for me !