WordPress 2.7.1 is available for download via WordPress.org and should be installed in an environment running PHP 5 and mySQL 5 (although some previous version with). Once the ZIP file is extracted to your web directory, you must perform a couple quick tasks.
You will need to create the mySQL database (I use phpMyAdmin for all mySQL interaction) and create a wp-config.php file. WordPress provides a sample config file in the root directory called wp-congif-sample.php. You’ll want to copy the sample file, and rename it wp-config.php. Edit the file and update the database constants (host, user, pass, database).