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Finishing the CAPTCHA proves you are a human and offers you short-term access to the web property.
What can I do to avoid this in the future?
If you are on a personal connection, like in the house, you can run an anti-virus scan on your device to make certain it is not infected with malware.
If you are at an office or shared network, you can ask the network administrator to run a scan throughout the network looking for misconfigured or contaminated gadgets.
Another way to avoid getting this page in the future is to use Privacy Pass. You may require to download variation 2.0 now from the Chrome Web Store