 that caused many Microsoft users to start their Friday with the so-called blue screen of death. The recovery process is slow for many systems that rely on Microsoft 365 apps linked to the cybersecurity company CrowdStrike. More from CBS's Daniel Bacchus. CrowdStrike, a Texas-based cybersecurity company, says the problem arose when it deployed a faulty update to computers running Microsoft Windows. It's the biggest global IT outage that we've ever seen in the world, and definitely a black-eye moment for CrowdStrike.