Installation Steps:
Download Test Link package from http://sourceforge.net/project/showfiles.php?group_id=90976
Install Xampp
Extract the testlink package folder and copy testlink folder in xampp\htdocs\testlink
OR
Extract the testlink package folder and copy testlink folder in inetpub\wwwroot\testlink (If using IIS)
Now open the browser and type http://localhost/testlink/install/index.php
Configure it by providing require information like user and password