Fix Error 0xEF: Critical_process_died

Applies to: Windows 10

This error means that there was a hardware malfunction or a device driver issue. The following are some things to try:

  • If you've installed any new apps or devices, uninstall or unplug them and then restart your PC.

  • Make sure your PC has the latest updates. Select the Start button, then in the search box next to Start, type Windows update and choose Check for updates from the list of results. In the Settings menu, select the Check for updates button. When it's finished, restart your PC by selecting the Start button > Power > Restart.