What is reCAPTCHA and why is it not working?

ReCAPTCHA is a free service from Google that helps protect websites from spam and abuse. A 'CAPTCHA' is a Turing test to tell human and bots apart. It is easy for humans to solve, but hard for 'bots' and other malicious software to figure out.

Why is reCAPTCHA not working on my computer?

There may be some instances where certain browsers do not display reCAPTCHA properly. For further information and troubleshooting, please refer to Google’s reCAPTCHA support page.