Published Sep 09, 2013 | Updated Sep 15, 2017

Ransom:Win32/Crilock.A

Severe |Detected with Windows Defender Antivirus

Aliases: No associated aliases

Summary

Windows Defender detects and removes this threat.

It encrypts your files and displays a webpage that asks you to pay a fee to unlock them.

This threat is usually installed on your PC by other malware. You can read more about ransomware on our Ransomware page.

Windows 10 protects you from ransomware. Read more:

Windows 10 Creators Update provides next-gen ransomware protection

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 other, hidden malware.

Advanced troubleshooting

You might be able to recover encrypted files by using the tool discussed in the MMPC blog post FireEye and Fox_IT tool can help recover Crilock-encrypted files.

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.