Google recently discovered some unusual activity on their search engine. After inspection with the help of security engineers, it has been found that the computers showing this kind of behavior were infected with a particular strain of malicious software, or “malware.”
Due to this malware, today some people might see a 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.” So, Google advised users to update their Anti Virus software and scan the entire computer to make sure you are safe from this infection.
Read the full report at Google Official blog here