google redirects to CAPTCHA

hello,

recently google has been redirecting me to a CAPTCHA page sometimes because of suspicious behavior or something like that

this has been worrying me alot and has caused me to think i am infected

i am using windows 7 ultimate.

via Bleeping Computer Last 20 Posts http://www.bleepingcomputer.com/forums/t/508963/google-redirects-to-captcha/