Get let's encrypt certificate in Windows.

get_cert.bat

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# 1. Make sure the link, http://www.yourdomain.com/.well-known/acme-challenge/, works.
  ************************************************
  * For apache httpd, add below to httpd.conf
  *************************************************

    # Let's encrypt folder
    Alias "/.well-known/acme-challenge" "/letsencrypt/acme-challenge"
    <Directory "/letsencrypt/acme-challenge">
        Options Indexes
        Require all granted
    </Directory>

  ************ End ************

# 2. Run get_cert.bat
# 3. Wait until it finshed, and copy server.crt to D:\servers\Apache24\conf\ssl\server.crt
# 4. Restart Apache server.

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# le32.exe is downloaded from: https://github.com/do-know/Crypt-LE/releases

le32 --domains "www.yourdomain.com" --path ./acme-challenge/ --generate-missing  --key account.key --csr server.csr --csr-key server.key --crt server.crt --live