Open C:\xampp\apache\conf\extra\httpd-ssl.conf
and add following lines
<VirtualHost *:443>
DocumentRoot "C:\xampp\htdocs"
ServerName domain.com:443
SSLEngine On
SSLCertificateFile "C:\xampp\apache\ssl\domain.crt"
SSLCertificateKeyFile "C:\xampp\apache\ssl\domain.key"
SSLCACertificateFile "C:\xampp\apache\ssl\domain.ca-bundle"
<Directory "C:\xampp\htdocs">
</Directory>
</VirtualHost>
