Sometimes warning windows appear on computer screens claiming to have detected viruses or security breaches, and urging the user to act immediately to protect their device. However, these messages may be part of scams that exploit the fear of data loss or account theft, with the aim of pushing the user to contact fake numbers, buy unnecessary software, or install tools that give scammers control over the device.
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The U.S. Federal Trade Commission (FTC) warns of scams in which attackers impersonate well-known technology companies, such as Microsoft and Apple, to convince victims that there is a security problem that requires urgent intervention.
These tricks rely on what is known as social engineering, that is, manipulating user behavior and pushing them to make a decision under pressure instead of verifying the message. The process may begin when visiting a website that displays a pop-up window claiming that the device is infected with a virus, or through a misleading advertisement that redirects the user to a fraudulent page.
Google's support guidelines explain that some unwanted websites and programs may cause frequent pop-up windows, redirect the browser to unfamiliar pages, or display alerts claiming the device is infected, but the appearance of the warning within the browser does not necessarily mean that the operating system itself has detected a threat.
After attracting the user's attention, the message may ask them to call a technical support number, download software to scan the device, or allow an unknown person to access it remotely. In some cases, the scammer claims to have conducted a scan and discovered serious threats, then asks for money to remove them, or tries to access passwords and financial data.
The Federal Trade Commission notes that these operations could end with the theft of money or personal information, or the installation of malware that allows an attacker to access files and accounts.
The likelihood of fraud can be inferred from a range of indicators, most notably: The Federal Trade Commission clarifies that genuine security alerts do not ask the user to call a number that appears inside a pop-up window for support.
Request for immediate payment : especially when demanding gift cards, cryptocurrencies , or money transfers in exchange for virus removal.
Request to install unknown software : or to download remote control tools based on instructions from an untrusted person.
The alert appears within a web page : especially if it continues to appear when the same site is opened, or tries to prevent the user from closing the page.
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