We're gradually updating threat actor names in our reports to align with the new weather-themed taxonomy. Learn about Microsoft threat actor names
Ransom:Win32/LockScreen.BO
Aliases: No associated aliases
Summary
Microsoft Defender Antivirus detects and removes this threat.
Ransom:Win32/LockScreen.BO is a threat that displays an image across your entire screen, preventing you from accessing your desktop. It tells you that to regain access, you must buy an online voucher to send to someone online. This type of threat is called ransomware, as it asks for a ransom, or fine, for you to regain your property.
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.
Microsoft doesn’t recommend you purchase the voucher. There is no guarantee that purchasing the voucher 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.
Advanced troubleshooting
To restore your PC, you might need to download and run Windows Defender Offline. See our advanced troubleshooting page for more help.
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.
Additional remediation instructions for this threat
This threat might make lasting changes to your PC's settings that won't be restored when it's cleaned. The following links can help change these settings back to what you want:
- Reset Internet Explorer settings
- Change security and privacy settings for Internet Explorer
- Enable Task Manager:
- For Windows 7
- For Windows Vista
- For other support and help related articles, go to:
- Microsoft Security TechNet Center
