Microsoft Defender Antivirus detects and removes this threat.

The threat is a HTML page used by the Ransom:Win32/Urausy.A ransomware trojan.

This threat stops you from loading Windows and displays a full-screen message, commonly called a "lock screen". If this threat asks you to pay a fee or fine, do not pay it. The message is a fraud.

It tries to scare you into paying a fine to unlock your PC.

Windows Defender detects and removes this threat.

This threat locks your PC and displays a full-screen message, commonly called a "lock screen". If this threat asks you to pay a fee or fine, do not pay it. The message is a fraud.

It pretends to be from the FBI or a national police force and tries to scare you into paying a fine to unlock your PC.

Typically, this threat gets on your PC when you visit a hacked webpage.

You can read more about this type on malware at the Ransom:Win32/Urausy family description or on our ransomware page.

Find out ways that malware can get on your PC.

Windows Defender detects and removes this threat.

This trojan can install other malware or unwanted software onto your PC.

Find out ways that malware can get on your PC.

Microsoft Defender Antivirus detects and removes this threat.

This ransomware can stop you from using your PC or accessing your data. It might ask you to pay money to a malicious hacker.

Our ransomware FAQ page has more information on this type of threat.

The trend towards increasingly sophisticated malware behavior, highlighted by the use of exploits and other attack vectors, makes older platforms so much more susceptible to ransomware attacks. From June to November 2017, Windows 7 devices were 3.4 times more likely to encounter ransomware compared to Windows 10 devices.

Read our latest report: A worthy upgrade: Next-gen security on Windows 10 proves resilient against ransomware outbreaks in 2017.