When the Google Captcha notice says that “Unusual traffic from your computer network is being detected?” The you can use this Google Captcha Removal Guide to cleanup your computer and removing the malware that causes the Google Captcha pages. If you frequently encounter the Google Captcha then it is very likely there is a malicious program running on your computer or another compromised computer on your home-network is likely performing automated Google searches.
The Google Captcha prevents automatic searches, and such Google searches are against the Google’s terms of service and creates unusual traffic that triggers the Google Captcha page. This page forces you to enter a displayed code on your screen to confirm that you’re not a program but rather a human being, before you can continue using Google. Google will displays only a Google Captcha page when it notices unusual Web-searching traffic. If you are searching for something on Google and get the Google Captcha message, indicates that “ Unusual traffic from your computer network is being detected?” then your computer is probably infected with malware, adware of other unwated programs which are responsible for the unusual traffic.