Google systems detected traffic

So you’re searching the internet, and Google tells you that their systems have detected unusual traffic from your computer network.
To continue, please type the characters below. Our systems have detected unusual traffic from your computer network. This page checks to see if it’s really you sending the requests and not a robot. Why did this happen?

What’s that? A virus? Follow Google recommendation and check you computer for malware, using a free antivirus like SpyBot. I’m almost sure it won’t detect anything that bad. The key phrase in this Google error is “from your computer network”. You may not know, but IPv4 addresses depleted a couple years ago. Before that, many internet providers shelled out a unique external IP address to each customer. But now, they have to group several customers to one external IP address, which is called NAT. Dozens, hundreds and thousands of customers may share the same external IP behind a providers’ NAT forming a computer network, and for Google, they are a single connection, since they all have a single external IP for all if them. That’s what Google is talking about. So if at least one of the customer among thousands sharing the same IP has a virus that sends automatic requests to Google, all of them will get the same error. In fact, you don’t even need a virus – if most of those customers simultaneously use a Google service, they may look like a robot to Google. So, enter the Captcha and continue your search. However stick to that recommendation and regularly check your device for viruses and avoid visiting “that” kind of sites.

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