1) First, you must have your own domain and hosting to install wordpress. Download wordpress and unzip.
2) Create database name, user and password on web server. Change/rename wp-config-sample.php wordpress file to wp-config.php and fill database details.
3) Upload all wordpress file to your web server folder like http://yourdomain.com/blog/. You can use ftp software like cuteftp or filezilla to upload wordpress script on web server.
4) Run wordpress installation like this http://yourdomain.com/blog/wp-admin/install.php and follow the step what you see there.
5) If you want to upload image to your wordpress, dont forget to cmod your wp-content to 777.
