"Suspicious Activity From Your IP Address" : What is it?

I have a Dell laptop with Windows 10 OS and it has been working good. Suddenly it started showing "Suspicious Activity From Your IP Address" system error and it keeps advising me to call on 1-866-633-3611. I did nothing on my system because the error message won’t let me to close it down. Is this a real alert from Microsoft? Do I really need to call for the technical help? Or it is just a scam and trying to hack my device? How do I get rid of this error problem? I was letting my son to play games and thsi pop-up comes. All access to this machine has been revoked due to this security breach. How do i remove it?

"Suspicious Activity From Your IP Address" : What is it?
"Suspicious Activity From Your IP Address" is a suspicious fake message. It pops up on your browsers though malicious websites. In many of researches found that the system users accidentally comes across the malicious ads and when they click on them then instantly got redirected on the sites where they got these kinds of scary error messages. These redirections occurs on your browsers when a potentially unwanted program installed on your PC without your consent using stealth installation of freeware bundling. It also records your whole online activity and valuable credentials to violate your privacy. It occurs on your browsers and convince you to call on some of the given numbers to take support help. But it is strongly advised to do not so so. It can takes your browsers and replaced existing settings to make redirections on scam sites to scare you to take paid services. It can degrade your PC performance. So you should try to remove "Suspicious Activity From Your IP Address" as soon as possible from your infected PC.