WannaCry is a type of ransomware that encrypts files and requires a bitcoin payment to recover them. It affected several industries, across 74 countries, including national health systems, and telecoms. It is imperative to address WannaCry vulnerabilities, as researchers report this threat is evolving.
To see if a company in your portfolio is vulnerable, go to your portfolio and use the Infections filter in your search. Apply the MS17-010 update to any unpatched Microsoft systems. This patch also covers Windows XP systems. See Microsoft: Customer Guidance for WannaCrypt attacks for additional guidance, including support for removing WannaCry with Windows Defender.