Your computer or another computer on your network is compromised with a virus. This allows online criminals to use it as part of a botnet to send spam and attack websites.
CloudFlare is working to stop web attacks and educate visitors with infected computers about how they can clean up their machines.
Make sure your anti-virus software is up to date and run a full scan.
This restriction will disappear when no more harmful behavior is detected. Completing the challenge above proves you are a human and gives you temporary access to the website.