Information

On a device with Sophos Endpoint Security and Control installed, the computer may fail to start after applying the 2019/4/9 Windows Update.

• Affected OS
  Windows 7
  Windows 8.1
  Windows 2008 R2
  Windows 2012
  
  
• Manufacturer information
  Sophos Central Endpoint and SEC: Computer fails to start or hangs after updating to Windows 9 April 2019 (Sophos Knowlege Base)
  
  
• Workaround
  If this issue prevents your PC from starting,
  
  1. Start in safe mode.
  Windows 8.1
  Windows 7
  
  2. Disable the "Startup type" of the Sophos Anti-Virus service.
  Right click on Start Menu-> Run-> Enter services.msc
  Right-click on the service named Sophos Anti-Virus from the list of services to display the properties and set the startup type to `` Disabled ''
  
  3. Reboot and start normally
  
  4. Uninstall the appropriate Windows KB.
  
  From Control Panel-> Programs and Features-> View Installed Updates, delete the following KB if any
  
  KB4493467
  KB4493446
  KB4493448
  KB4493472
  KB4493450
  KB4493451
  
  5. Set the "Startup type" of the Sophos Anti-Virus service to automatic.
  Right click on Start Menu-> Run-> Enter services.msc
  Right-click the service named Sophos Anti-Virus from the list of services to display the properties, and set the startup type to "Automatic"
  
  
  6. Reboot