Copy and paste the below one-liner into your powershell console (WIN+R, then "powershell.exe")
Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; Invoke-Expression ((New-Object System.Net.WebClient).DownloadString('https://gist.githubusercontent.com/bananaacid/1dc9117571967b26ceabc972009137ae/raw/install_PowerShellGSM.ps1'))