• If you receive an unsolicited email message or phone call that purports to be from Microsoft or another company asking that you to send personal information or click links, ignore or report the email, or hang up the phone. In general, unless you are absolutely sure you can trust the caller or the sender, do not share personal information, click links, or install applications when requested.

  Note that Microsoft does not send unsolicited email messages or make unsolicited phone calls to request for personal or financial information, or fix your computer.

• Do not trust unsolicited calls. Do not provide any personal information.

  Remember, Microsoft will never proactively reach out to you to provide unsolicited PC or technical support. Any communication we have with you must be initiated by you.

• Download software only from official vendor websites or the Microsoft Store. Be wary of downloading software from third-party sites, as some of them might have been modified without the author’s knowledge to bundle support scam malware and other threats.

• Use Microsoft Edge when browsing the Internet. It blocks known support scam sites using Windows Defender SmartScreen (which is also used by Internet Explorer). Furthermore, Microsoft Edge can stop pop-up dialogue loops used by these sites.

  Don’t call the number in the pop-ups. Microsoft’s error and warning messages never include a phone number.

• Enable Windows Defender Antivirus on Windows 10. It detects and removes known support scam malware, such as SupportScam:AutoIt/Noland, SupportScam:JS/TechBrolo, SupportScam:MSIL/Hicurdismos, SupportScam:MSIL/Tifine.A, SupportScam:Win32/Cusax, SupportScam:Win32/Monitnev, and SupportScam:MSIL/Secupoint.A.

https://www.microsoft.com/en-us/wdsi/threats/support-scams