The reason
Fb.com-directory.co alerts are showing up is because of an advertising-supported application infection. These false adverts commonly aim to deceive users into dialing alleged tech-support who would first ask for remote access to your computer, and then install overpriced, possibly useless software. If an advertising-supported application is indeed responsible, expect highly invasive ads. An adware is often attached to free programs, and if you don't untick it, it will install alongside the application. Just to be clear, the ads are pretty harmless by themselves, and if you don't call the scammers, no harm will be done. If you did call them, you would have to deal with people who scam others for a living, and they would pretend to fix your device, and then ask for an unreasonable amount of money. You should never call the numbers in these dubious warnings, and you should also never provide access to your OS to questionable people. You can be calm that this contamination the advertisement is warning you about it isn't real, and that your operating system is safe. If you want to prevent the irritating adverts, all you need to do is delete Fb.com-directory.co.
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