https://chocolatey.org/install#individual
1. powershellを管理者で起動
2. 以下のURLからコマンドをコピペ
https://chocolatey.org/install#individual
Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex *1
終わり
*1:New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'
