Originally Posted By: hybrid8

Trying to log into your Google "apps" account or adsense or really anything at Google will, quite very often, prompt you with a CAPTCHA. Why? There's never a reason or error given about your attempt to log in with username and password.

You must have annoyed them, I've never seen a captcha connected to any of my Google logins/services.

Maybe you are using a bit of software that is logging into your Google account and doing something to trip their "not a human" throttle ?
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