Here’s a youtube video from Sophos that shows how you can get infected from a Google Ad advertising Norton. Note how on the fake Norton website the colors are yellow like Norton Antivirus or Symantec, but there’s no real name, only the word “Anti-virus,” a clue you’re not getting the real deal, but a rogue antivirus. Be aware when going to unfamiliar sites. In the meantime, I’ll try to let Google know this is a fraudulent website. We call that a phish website. Try not to go phishing, the phish ARE biting, but are biting right in the ol kazoo, meaning where it hurts most: your wallet and computer.
If you did buy the fake Norton from the phish website, it wouldn’t work, and would infect your computer with more viruses and spyware.