The bare fact is that many of these scams operate from outside of the U.S.'s jurisdiction. And, because they play on users' lack of security knowledge and training, the scams will always find a ready population of victims.
What's to be done? Microsoft advises consumers to refrain from purchasing any software or services from someone who calls you claiming to be from Microsoft or another technology. Beyond that, consumers should never agree to give a stranger remote control of your computer, or provide credit card or financial information to a phone tech support operator who called you. Instead, take down their name and number and report it to the local authorities.
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