Published Nov 15, 2013 | Updated Sep 15, 2017

Ransom:Win32/Crowti.A

Severe |Detected with Windows Defender Antivirus

Aliases: No associated aliases

Summary

Windows Defender detects and removes this threat.

This ransomware encrypts the files on your PC and directs you to a webpage with instructions on how to unlock them. It can ask you to make a payment using bitcoins.

The ransom or "lock" screen can use the name CryptoDefense or CryptoWall.

See the Win32/Crotwi family description for more information.

Windows 10 protects you from ransomware. Read more:

Windows 10 Creators Update provides next-gen ransomware protection

More information about ransomware can be found on our Ransomware page.

Find out ways that malware can get on your PC.

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

Use the following free Microsoft software to detect and remove this threat:

You should also run a full scan. A full scan might find hidden malware.

Advanced troubleshooting

To restore your PC, you might need to download and run Windows Defender Offline. See our advanced troubleshooting page for more help.

Get more help

You can also visit our advanced troubleshooting page or search the Microsoft virus and malware community for more help.

If you’re using Windows XP, see our Windows XP end of support page.

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