The Problem
You click Start or press the Windows key and nothing happens—or the menu flashes open and vanishes. Search inside Start may be dead as well. This is almost always the shell (explorer.exe) or a broken Start layout, not grounds for reinstalling Windows.
Taskbar frozen but Start works? See taskbar not working or disappearing. Search broken but Start opens? Try fix Windows 11 search.
Step 1: Restart Windows Explorer
Fixes a large share of cases in five seconds.
Ctrl + Shift + Esc→ Task Manager.- Processes → right-click Windows Explorer → Restart.
- Test Start and the Windows key.
If Explorer is not listed: Run new task → type explorer.exe → OK.
Step 2: Sign Out, Then Restart Properly
Ctrl + Alt + Del→ Sign out → sign back in. This clears a stuck shell session after sleep or an update, and is quicker than a reboot.- If that does not do it, choose Restart rather than Shut down. With Fast Startup on, a shutdown restores the same broken kernel state; a restart does not.
If it broke immediately after Patch Tuesday, also read fix Windows 11 after a bad update.
Step 3: Remove Third-Party Start Replacements
StartAllBack, ExplorerPatcher, Start11, Open-Shell and similar tools hook directly into the shell and break with almost every Windows update. A dead Start menu right after an update on a PC running one of them is that tool, not Windows.
Uninstall it from Settings → Apps → Installed apps, restart, and test. Reinstall only after the vendor has published a build for your Windows version.
Step 4: Re-register the Start Components
In Terminal (Admin):
Get-AppxPackage Microsoft.Windows.StartMenuExperienceHost | Reset-AppxPackage
Get-AppxPackage Microsoft.Windows.ShellExperienceHost | Reset-AppxPackage
Restart. If those error, run the broader re-registration—it keeps your files:
Get-AppxPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
Expect several red errors about packages that cannot be re-registered; those are normal.
Step 5: Rebuild the Start Layout Database
A corrupted tile database stops Start opening while everything else works. Close all apps, then in Terminal (Admin):
taskkill /f /im StartMenuExperienceHost.exe
Then delete the database folder at:
%LocalAppData%\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState
Restart. Windows rebuilds it. You may need to re-pin your tiles, which is the only cost.
Step 6: Repair System Files
DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow
Run DISM first, then SFC, then restart. Details: repair Windows 11 with SFC and DISM.
Stuck updates can break the shell too—fix Windows Update stuck if patches never finish installing.
Step 7: Check the Critical Services
Win + R → services.msc. These must be running:
- Application Identity
- User Manager
- Tile Data model server (older builds)
- Windows Search, if search inside Start is the broken part
Set anything stopped to Automatic and start it.
Step 8: Test a New User Account
This separates a broken profile from a broken installation.
- Settings → Accounts → Other users → Add account → I don't have this person's sign-in information → Add a user without a Microsoft account.
- Sign into the new account and test Start.
Works there → your original profile is damaged. Moving to the new profile is usually faster than repairing the old one; copy your data across from C:\Users\<old>. See fix "signed in with a temporary profile".
Broken there too → the installation itself is damaged. Go to the last step.
Step 9: In-Place Repair Install
Download the Windows 11 ISO from Microsoft, mount it, run setup.exe from inside Windows, and choose Keep personal files and apps. This rebuilds every shell component without touching your data: reinstall Windows without losing data.
Working Around It Meanwhile
Win + Rfor Run, then type program names directly.Win + Xopens the power-user menu with Terminal, Device Manager, and Settings.Win + Ifor Settings,Win + Efor File Explorer.- Pin the apps you need most to the taskbar.
What Not to Do
- Don't delete registry keys from forum posts. Broken
StartMenuExperienceHostkeys are hard to reverse. - Don't run
Remove-AppxPackageon StartMenuExperienceHost. You will be left with no Start menu at all and no easy route back.
After It Works
Keep the Start grid small—very large pinned layouts slow the menu's load. If it breaks again after every sleep cycle, update the BIOS and graphics drivers, and turn off Fast Startup: Control Panel → Power Options → Choose what the power buttons do → untick Turn on fast startup.
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