Step 3: In the pop-up window, select “Symantec Antivirus for XP/Vista/Windows 7 (Windows)”. Click “Continue” once you\’ve made your selection.
Step 5: Select the correct version of your OS, 32-bit or 64-bit (click here to determine which you have) and select “Continue”.
Step 9: After the computer restarts, the installer will automatically resume and install SEP Version 12. When completed, the installer will exit on its own and Symantec LiveUpdate will run automatically and invisibly. After a few minutes, SEP Version 12 will be up-to-date with the latest malware protection.