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561 entries found. Displaying page 4 of 29.
Updated on Jan 07, 2011

Microsoft Defender Antivirus detects and removes this threat.

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.

You can read more on our ransomware page.

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.

Alert level: severe
Updated on Jun 21, 2011

Microsoft Defender Antivirus detects and removes this threat.

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 or texting a premium-charge phone number to unlock your PC.

You can read more on our ransomware page.

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.

Alert level: severe
Updated on May 20, 2025
Alert level: severe
Updated on May 14, 2010
Alert level: severe
Updated on Jul 02, 2010

Microsoft Defender Antivirus detects and removes this threat.

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.

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.

Alert level: severe
Updated on Nov 16, 2010
Alert level: severe
Updated on Dec 08, 2010
Alert level: severe
Updated on Oct 28, 2011
Alert level: severe
Updated on Dec 09, 2011
Alert level: severe
Updated on Dec 12, 2011
Alert level: severe
Updated on Dec 12, 2011
Alert level: severe
Updated on May 29, 2012
Alert level: severe
Updated on Jul 26, 2012
Alert level: severe
Updated on Aug 29, 2012
Alert level: severe
Updated on Sep 25, 2012
Alert level: severe
Updated on Nov 14, 2012
Alert level: severe
Updated on Nov 22, 2012
Alert level: severe
Updated on Dec 19, 2013

Windows Defender detects and removes this threat.

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.

You can read more on our ransomware page.

Alert level: severe
Updated on Oct 09, 2014

Windows Defender detects and removes this threat.

This threat can perform a number of actions of a malicious hacker's choice on your PC.

See the Win32/Chroject family description for more information.

Find out ways that malware can get on your PC.

Alert level: severe
Updated on Oct 09, 2014

Windows Defender detects and removes this threat.

This threat uses your PC to perform click fraud. It runs in the background and uses a significant amount of your PC's power and network bandwidth. This can severely impact the performance of your PC, the speed of your Internet connection, and may lead to excess data usage charges from your Internet service provider.

Find out ways that malware can get on your PC

Alert level: severe