i have preinstalled laptop i want to activate it.
This isn't very explanatory as to what is happening when you try to activate it. Also it would help to know what operating system and service pack, if applicable, you are using, also what version of Internet Explorer is installed.
If you need help activating you can contact Technical Support free of charge here: http://service.mcafee.com/faq/country.html
(See Asia Pacific (APAC) )