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I was on Facebook, clicking to a story when an audio and screen pop up declared that a virus was on my computer.

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I was on Facebook, clicking to a story when an audio and screen pop up declared that a virus was on my computer. All of the pop up said that Microsoft was letting me know and included this phone number 1-888-659-1228 to contact for further assistance. Just checking to see if you feel this is legit?

I was on Facebook, clicking to a story when an audio and screen pop up declared that a virus was on my computer. All of the pop up said that Microsoft was letting me know and included this phone number 1-888-659-1228 to contact for further assistance. Just checking to see if you feel this is legit?

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That sounds totally bogus. They probably are an advertiser wanting to subscribe you to their service for a couple hundred dollars are year. Avoid! Avoid!

Do you use Microsoft's Windows Defender software on your computer, or a non-Microsoft security program? Something? Anything?

If you have any doubts about whether this was a random web ad or possibly generated by something on your system, you can supplement your regular security software with the free scanning/cleaning programs listed in our support article: Troubleshoot Firefox issues caused by malware.