Guard against Petya ransomware

Applies to: Windows 10

A wide-spread ransomware attack, known as "Petya," targets out-of-date Windows devices. Given the severity of this threat, Microsoft recommends that you immediately update your Windows devices. You should:

  • Turn on automatic updates and verify your devices are up to date.

    • In Windows 10, go to Settings  > Update & Security . You'll see your update status there.

    • In Windows 8.1, go to Settings > Change PC Settings > Update and recovery.

    • In Windows 7, go to Control Panel > Windows Update.

  • Ensure you have the latest antivirus updates for your antivirus product. If you use Windows Defender and Windows automatic updates are on, you'll automatically get the latest updates. 

  • For more information, see