npm install -g #vue/cli get error VUE CLI INSTALL ERROR - node.js

Question

I'm on PC/Windows 10, node15.0.0, npm 6.14.8
I just wanted to install Vue CLI and I got this error.
I have the latest version of Node.js as you can see below. I tried some different ways like npm uninstall -g vue-cli and npm cache clean --force, but, it did not work.
npm ERR! code EPERM
npm ERR! syscall mkdir
npm ERR! path C:\Program Files\nodejs\node_modules\.staging
npm ERR! errno -4048
npm ERR! Error: EPERM: operation not permitted, mkdir 'C:\Program Files\nodejs\node_modules\.staging'
npm ERR! [OperationalError: EPERM: operation not permitted, mkdir 'C:\Program Files\nodejs\node_modules\.staging'] {
npm ERR! cause: [Error: EPERM: operation not permitted, mkdir 'C:\Program Files\nodejs\node_modules\.staging'] {
npm ERR! errno: -4048,
npm ERR! code: 'EPERM',
npm ERR! syscall: 'mkdir',
npm ERR! path: 'C:\\Program Files\\nodejs\\node_modules\\.staging'
npm ERR! },
npm ERR! errno: -4048,
npm ERR! code: 'EPERM',
npm ERR! syscall: 'mkdir',
npm ERR! path: 'C:\\Program Files\\nodejs\\node_modules\\.staging',
npm ERR! parent: '#babel/core'
npm ERR! }
npm ERR!
npm ERR! The operation was rejected by your operating system.
npm ERR! It's possible that the file was already in use (by a text editor or antivirus),
npm ERR! or that you lack permissions to access it.
npm ERR!
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator.
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\lixin yang\AppData\Roaming\npm-cache\_logs\2020-10-31T14_42_05_231Z-debug.log
Any idea what that means and how to solve it?
I found that I could do nothing but press enter

Answer 1

Possible fixes:
open cmd as administrator - search for cmd, right-click, and open as administrator.
run this command npm cache clean --force
npm install again in this administrator cmd.
if still didn't work, close all node processes and try these steps again, also can try these after a system restart.