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South Lyon Schools to Reopen Thursday After 3-Day Cyberattack Shutdown

Officials say restored stability will allow classes to resume.

Overview

  • The district announced classes will resume on Thursday, Sept. 18, 2025, after a cyber incident kept schools closed for three days.
  • Leaders reported significant progress restoring systems and warned of continued disruption to some functionality as work continues.
  • The outage began Sunday, Sept. 14, and left phones, computers, and internet-connected services across the district unavailable.
  • Officials said they are working with external cybersecurity experts to investigate the incident and bring systems back online safely.
  • The district said students’ personal information was not compromised and it will continue providing updates by email and on its website.