A massive IT outage for Windows users knocked out important healthcare, business, and transportation systems worldwide starting Thursday evening and continuing Friday.
Airports were crowded with stranded travelers as major U.S. airlines grounded flights.
Emergency 911 call service was disrupted in several U.S. states, although service improved throughout the morning. Several healthcare providers warned that they would have to delay procedures.
Microsoft and cybersecurity company CrowdStrike said the underlying problems were being fixed, but the incident underscored how a software glitch can have profound ripple effects throughout the global community and disrupt daily life in tangible ways.
