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Alert level: Severe Detected with Windows Defender Antivirus
Also detected as: Trojan.Winlock.2741 (Dr.Web) PWS-Spyeye.e (McAfee) Mal/Zbot-AV (Sophos) Cryp_Zbot-17 (Trend Micro)
Windows Defender Antivirus detects and removes this threat.
Ransom:Win32/LockScreen.AO is a ransomware that locks you out of your desktop. It asks you to pay a ransom fee so that you can regain use of your desktop.
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.