Aliases: Trojan-Ransom.Win32.PornoBlocker.bho (Kaspersky) W32/Ransom.KB (Norman) Trojan.PornoBlocker!CvjyYihPT7M (VirusBuster) TR/Ransom.PornoBlocker.bho (Avira) Win32/LockScreen.XU (ESET) Trojan-Ransom.Win32.PornoBlocker (Ikarus) TROJ_RANSOM.FP (Trend Micro)
The threat locks your screen and prevents you from using your desktop. It shows you a message saying that if you want to regain access to your desktop, you have to pay a fine in the form of an SMS sent to a premium number.
This type of threat is known as ransomware.
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.
Microsoft doesn’t recommend you pay the fine. There is no guarantee that paying the ransom will give you access to your files.
If you've already paid, see our ransomware page for help on what to do now.
Run antivirus or antimalware software
The following free Microsoft software detects and removes this threat:
- Windows Defender for Windows 10 and Windows 8.1, or Microsoft Security Essentials for Windows 7 and Windows Vista
- Microsoft Safety Scanner
Even if we've already detected and removed this particular threat, running a full scan might find other malware that is hiding on your PC.
You can also ask for help from other PC users at the Microsoft virus and malware community.
If you’re using Windows XP, see our Windows XP end of support page.