Install Python amd64 via Windows Powershell

InstallPython.ps1

# Ask for administrator privilege
if (!([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
    Start-Process PowerShell -Verb RunAs "-NoProfile -ExecutionPolicy Bypass -Command `"cd '$pwd'; & '$PSCommandPath';`"";
    exit;
}

# Check if Python exists before installation
if(&{python -V} 2>&1 -is [System.Management.Automation.ErrorRecord]) {
    $TEMP_DIR = [System.IO.Path]::GetTempPath()
    $PYTHON_VERSION = "3.8.10" # Specify Python version from https://www.python.org/downloads/windows
    $SAVED_NAME = "python-$PYTHON_VERSION-amd64.exe"
    $DOWNLOAD_URL = "https://www.python.org/ftp/python/$PYTHON_VERSION/$SAVED_NAME"
    
    bitsadmin.exe /transfer "Download Python $PYTHON_VERSION" $DOWNLOAD_URL $TEMP_DIR$SAVED_NAME
    cd $TEMP_DIR
    Invoke-Expression ".\$SAVED_NAME /quiet InstallAllUsers=0 PrependPath=1 Include_test=0"
}