To stop Microsoft Edge from opening on startup, turn off Windows restart apps, disable Edge in Startup apps, and switch off Edge’s own startup boost. Microsoft’s support page says to go to Start > Settings > Accounts > Sign-in options and turn off Automatically save my restartable apps and restart them when I sign in.

Try these steps

  1. Open Settings.
  2. Go to Apps > Startup.
  3. Find Microsoft Edge and turn it Off. This is also reflected in community and tutorial guidance for Windows 10/11.
  1. Open Edge itself.
  2. Go to Settings > System and performance.
  3. Turn off Startup boost and, if shown, background-related options that let Edge keep running after you close it.
  1. Go back to Settings > Accounts > Sign-in options and turn off the restartable-apps setting if it is enabled.

If Edge still opens

  • Check Task Manager > Startup apps and disable any Edge entry there.
  • Look in the Startup folder for an Edge shortcut and remove it if present.
  • If a different browser is supposed to open instead, set that browser as your default web browser.

What usually works fastest

The most common fix is disabling Microsoft Edge under Startup apps plus turning off Startup boost inside Edge. If the browser keeps reopening after that, the Windows restart-apps setting is usually the next thing to change.

TL;DR: Disable Edge in startup, turn off Startup boost, and switch off Windows restart apps.