Norton Internet Security is an application developed by Symantec and includes an antivirus, an anti-spyware and a firewall program. It's crucial to have some sort of protection software while surfing the Internet to guard your computer from various web parasites, and Norton provides an efficient solution. You can purchase this software online and download it directly from Symantec.
Go to the Norton Internet Security product site (see the "Resources" section) and choose the "Download" option for purchase. Once you've purchased the application, click "Download" on the Order Status page and follow the instructions to download the application file.
Double-click the downloaded set-up file and follow the step-by-step directions of the Installation Wizard to install the application on your computer. The Norton Internet Security suite will be launched automatically upon installation.
Click the "Activate Now" button in the bottom-right of the Norton Internet Security window to connect to the Norton servers and start the activation process.
Type in the product key that was supplied with the purchase and click "Next."
Type in your e-mail address in the Norton Account window and click "Next."
Type in your password if you already have a Norton account, or fill out the new account information and click "Next." Then click "Done."