Probably not. I`ve come across several similar experiences from friends who have phoned me in a panic. There are websites out there that do this and it looks similar to a real attack on the machine. In reality the webpage is trying to legitimately (Or otherwise) get you to try a piece of AV software or malware remover but the script on the page is so similar to something malevolent that your own security software kicks in to disable it.
iPhone 7 review: a range of small updates add up to an excellent phone