 NBC News Radio. I'm Rob Bartir. Computer systems around the world are being affected by a global cyber outage. Airlines, hospitals, banks, and media companies have been struggling to get back online. The outage was caused Thursday night by a Windows update from cybersecurity company CrowdStrike. Microsoft says it's working with companies to get them back online. CrowdStrike shares fell over 11% after the company disclosed that it is responsible for the global outage.