Microsoft Edge won't launch after latest update

Since Edge appears as msedge.exe in background processes but no window opens, the documented causes to check first are leftover Edge processes, graphics acceleration, a corrupted profile, and a broken installation.

Try these in order, restarting Edge after each step:

1. End all Edge background processes
   • Press Ctrl+Shift+Esc to open Task Manager.
   • End every msedge.exe process.
   • Start Edge again.
2. Test with a temporary Edge profile
   • Open Command Prompt.
   • Run:

          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --user-data-dir="%TEMP%\edge-test-profile"
     

   • If Edge opens with this command, the original profile is likely corrupted.
3. Create a new profile if the temporary profile works
   • Close all Edge windows.
   • Go to: %LOCALAPPDATA%\Microsoft\Edge\User Data
   • Rename the Default folder to Default.old.
   • Start Edge again so it creates a fresh Default profile.
   • If Edge is stable, copy needed data such as Bookmarks from Default.old into the new profile.
4. Repair Edge again from Installed apps
   • Go to Settings > Apps > Installed apps.
   • Select Microsoft Edge > Modify > Repair.
   • This requires administrative rights and an internet connection. Browser data and settings should not be affected by repair.
5. If the problem started after a Windows update, check for a newer fix
   • Some Windows updates have caused Chromium-based browsers such as Edge to show a white screen or fail to open.
   • Install the latest available Windows updates from Settings > Windows Update > Check for updates.
6. If this is an update-related browser launch issue on an affected system, check IFEO registry entries
   • A documented Windows issue can prevent Chromium-based browsers from opening when browser-specific Image File Execution Options (IFEO) registry entries exist for msedge.exe.
   • Warning: Registry changes are risky. Back up the registry before making changes.
   • In Registry Editor, check: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\
   • If there is an msedge.exe key there, that can be related to the launch failure described in the Windows known issue.

Based on the steps already tried, the most useful next test is the temporary profile command. If that works, the issue is likely the Edge profile rather than the Windows update itself.

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• January 9, 2024—KB5034129 (OS Build 20348.2227)