To Install Norton Anti-Virus, you have to verify that your operating system meets the requirements for Norton AntiVirus. After that, click "Start" and "Control Panel." Then, pick "Uninstall a Program" if your computer runs Windows 7 or Vista. If your computer runs Windows XP, you need to pick "Add or Remove Programs." Next, find any other antivirus program you may have installed on your computer in the list of installed programs. You must click "Remove" or "Uninstall." Forth, pick "Remove All" to confirm that you want to uninstall the other antivirus program. After that, click "Restart Windows Now (Recommended)" and "Finish." Then, Insert the Norton CD into the CD-ROM drive. You should click "Install Norton AntiVirus" if you purchased a CD. If you downloaded a copy of Norton AntiVirus, you can double-click the file to begin installation. Next, remove the check from the box next to the option to join Norton Community Watch in the Norton AntiVirus 2011 window if you do not want to join the group. Forth, pick "Install Options" and "Browse" if you want to choose your own location to install Norton. When you find the new location, you have to click "OK." You need to Skip these steps if you are fine with the default location. After that, Click "User License Agreement" and read the license agreement. You must click "Close." Then, pick "Agree and Install." Next, click "Activate Now" in the Norton AntiVirus window to activate your copy. Forth, Type in the Product Key included with your CD and click "Next." After that, enter your email address and click "Next" again. Then, Type in the password if you already have a Norton account. If you do not have an account, you should pick "Sign up now," put in the required information and click "Sign Up." Last, Look over your subscription details and click "Done."