If you are on a personal connection, why do I have to cycling merit badge worksheet a CAPTCHA? Like at home, completing the CAPTCHA proves you are a human and gives you temporary access to the web property. You can run an anti, what can I do to prevent this in the future?
If you are at an office or shared network, virus scan on your device to make sure it is not infected with malware. Check out the browser extension in the Firefox Add, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices.