A strange post on Google's security blog yesterday said that it was warning "some people" about malware they may have been tricked into downloading on their computers.
The post is totally vague about how many people are affected--probably because Google has no idea how many computer are infected.
"We determined that the computers exhibiting this behavior were infected with a particular strain of malicious software, or “malware," says the post. "As a result of this discovery, today some people will see a prominent notification at the top of their Google web search results."
"This particular malware causes infected computers to send traffic to Google through a small number of intermediary servers called 'proxies,”' says Google. "We hope that by taking steps to notify users whose traffic is coming through these proxies, we can help them update their antivirus software and remove the infections."
See the notification below, which really is likely to be dismissed by people as a fake.
As mentioned yesterday, social engineering attacks are really the main security threat to watch out for because you can't tell whether to trust notifications like this one from Google, which is real