Windows Defender detects and removes this threat.

This threat is detected in a webpage that shows a fake security scanner. It falsely tells you that your PC is infected with viruses and that you need to install other software to disinfect it. The software it offers for install is usually a rogue security software, which doesn't clean your PC and instead tells you that you need to pay for more, nonexistent, cleaning.

See the Rogue security software page for more information.

This program was detected by definitions prior to 1.159.567.0 as it violated the guidelines by which Microsoft identified unwanted software. Based on analysis using current guidelines, the program does not have unwanted behaviors.

Trojan:JS/FakeAlert is the detection for a webpage that displays a fake scanning interface alerting the user that infected files have been found when none actually exist.