step 1 :
Upload all files into your host
step 2 :
Open file (admin/login.php) and find :
$url = 'http://your-domain/whmcs/license/index.php';
replace with your url
step 3:
Install with link :
(
http://your-domain/whmcs/install/install.php)
using key : 123456
step 4:
Open (addkey.php) and find
$licensefile = @file_get_contents("http://localhost/whmcs/license/index.php");
and replace with your url
step 5:
Run link and follow intro addkey.php
(
http://your-domain/whmcs/addkey.php)
step 6:
Delete (addkey.php) and folder (install)