I tried it, on step 6 I get below error

C:\npm\package>node bin/npm-cli.js install npm -gf
npm WARN using — force I sure hope you know what you are doing.
npm ERR! path C:\node\npm.cmd
npm ERR! code EEXIST
npm ERR! Refusing to delete C:\node\npm.cmd: is outside C:\node\node_modules\npm and not a link
npm ERR! File exists: C:\node\npm.cmd
npm ERR! Move it away, and try again.