REMOVE HACKER at 188.8.131.52
I think that you should check your computer for adware that might has altered your browser without your knowledge. Such viruses modify web browsers according to their needs and then display fake ads which are supposed to trick users into contacting "Microsoft support. In reality, these victims are tricked into signing up for useless services or convinced to install malware. Good guide that explains this technique of swindling people's money: https://www.2-spyware.com/remove-internet-security-alert-virus.html
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