How do you install NortonInternet Security 2010 into another computer?

Hi so I recently purchased Norton Security 2010 and installed it into my laptop. However it said that it could be installed onto 2 additional computers. My brother’s PC is in need of security, and i just cannot figure out how to put it on his computer, could someone help me?
Sorry, i forgot to mention i purchased it from the internet

A new virus attack on Iran? – Hotair.com

According to Iran, a new computer virus has attacked their military systems as part of an ongoing cyberwar against Tehran’s government.  Called “Stars,” the virus attacks computer systems and causes “minor damage,” according to the Iranian gover …
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How do you remove Security Tool from your computer?

Somehow a program called Security Tool attached itself to this computer. I cannot get to the Windows Trash Bin, Control Panel. Can anyone help me? I tried to email the author of this program (TrafficZ) and I haven’t got a response. This computer keeps restarting itself and is about to crash. Can someone please help me?

How do i change my SECURITY QUESTION FOR MY COMPUTER?

i used to have a password for my computer but i changed it and i set a question that would remind me what my password is to log on to my computer. But now since i changed my password the security question doesn’t fit my NEW password. How do i change the security question to match the password i have now?