To install wordpress under your doamin,please follow the following steps :-
1) Login to Plesk 10.x control panel.
2) Click on "Subscriptions" and then Click on "Manage Hosting" in front of the domain.
3) Click on "Applications" Tab.
4) Click on "Install " button to WordPress to install the application.
5) Click on the check box in front of "I accept the terms of License
Agreement " and press "Next".
6) Select the domain under which you want to install this application and
the directory under which you want to install.
Enter the following details:-
Administrative username : "admin" or as per your choice
Administrative password : as per your choice
Confirm Password :
If you want to install on "ROOT" Then remove "wordpress" name
and then press "Install"
After fer seconds you will get below message:
Information: WordPress was successfully installed at http://test.com/wordpress.
8) You will get the notice "Information: WordPress was successfully installed at http://test.com/wordpress".
once the wordpress is installed under your domain.
Note: If you want to remove installed web application "Just click on Remove button"