Is this FBI Warning Popup Legit or Scam?
It is actually scam. FBI will never pop up alerts from the web. You shouldn’t trust it. It is usually caused by malware or advanced cookies. The malware may sneak into your computer via different channels such as infected software installs, spam-email attachments, share files, suspicious hyperlinks or pop-ups. Once infected, it will modify a number of settings in your computer, usually browser settings so that the pop-up can keep showing up. Same to other malware invasion, there will be a lot of problems aroused.