You click the Start button or press the Windows key and nothing happens, or the menu flickers and closes, or opens blank. The Start menu runs as its own process on top of Windows Explorer, so most of the time a restart of those processes or a repair of system files brings it back.
These fixes are ordered from quickest to most involved. None of them delete your files.
While you fix it, these still work:
The taskbar disappears for a moment and returns. Try Start again.
Press Ctrl + Alt + Delete and choose Sign out, then sign back in. If that doesn't help, use the power icon on the same screen to Restart. A restart reloads everything fully, unlike a shut down when Fast Startup is on.
Start menu bugs are often fixed in monthly updates, and a half-finished update can also cause them.
If the problem began straight after an update, open Windows Update > Update history > Uninstall updates and remove the most recent quality update as a test. Reinstall it later once a fix is released.
DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow
SFC reports whether it found and repaired anything. If it says it couldn't fix some files, run both commands once more after the restart.
Third-party programs that change the Start menu or taskbar (Start replacements, taskbar tweakers, theme tools) are a frequent cause, especially after a Windows update. Open Settings > Apps > Installed apps, and uninstall or update any such tool, then restart. We don't recommend these tools; the built-in Settings pages cover most Start menu changes, such as removing the Recommended section.
This tells you whether the problem is Windows itself or just your profile.
If Start works there, your profile is damaged. The simplest fix is usually to copy your documents to the new account (from C:\Users\<old name>) and use it from now on. Back up first, and make the new account an administrator if you need to (Other users > select it > Change account type).
If Start broke after installing a program or driver, go back to a restore point from before the problem.
rstrui and press Enter.System Restore doesn't touch your documents, but programs installed after that point will need reinstalling.
Windows 11 can reinstall its own system files while keeping your apps and files. Open Settings > System > Recovery, and under Fix problems using Windows Update, click Reinstall now (available on recent Windows 11 versions). Back up important files first, just in case, and keep the PC plugged in.
If Start opens but looks like Windows 10 or has odd visuals, see why Windows 11 looks like Windows 10. If the taskbar has jumped to the side, see taskbar moved to the side. If the whole PC is sluggish rather than just Start, try Windows running slow: 15 fixes.
Right-click the Start button or press Windows + X for the power user menu, press Windows + R for Run, or press Ctrl + Shift + Esc for Task Manager. Settings opens with Windows + I.
Yes. The taskbar and desktop disappear for a few seconds and come back. Open File Explorer windows close, but your files and open programs are not affected.
No. They check and repair Windows system files only. DISM may download replacement files from Windows Update, so keep the PC online while it runs.
Then the problem is in your user profile rather than Windows itself. Moving your files to a new account is often quicker than repairing the old profile.
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