Please try to login here : https://home.mcafee.com/secure/protected/login.aspx with your Email address and password. If necessary select India as your country near the top right.
If you are able to get into your account page , then right click on the M icon on the system tray (right bottom corner)
Click on Activate/register and enter the same Email address and password , that should get you registered.
Note : If you already have a McAfee account , please select the option I already have a McAfee account after step 3.
If not click 'Register Now; and follow the prompts to create a new accounbt. Once done then do the taskbar right-click mentioned above..
If you still encounter issues, please click on Useful Links at the top of this page and click on Customer Service and our product specialist would help you get registered, it's a free service.