File Explorer stops responding
Identify shell extensions, locations, or storage devices that trigger Explorer hangs.
- Updated
- September 3, 2026
- Reading time
- 7 min read
- Windows support
- Windows 11 · Windows 10
Quick diagnosis
Identify shell extensions, locations, or storage devices that trigger Explorer hangs. The key distinction is whether “Explorer says Not responding” occurs by itself or together with “folders open slowly.” That difference helps separate unavailable network path from shell extension.
Symptoms
- Explorer says Not responding
- Folders open slowly
Likely causes
- Unavailable network path
- Shell extension
- Storage error
Quick reversible checks
- Restart Windows Explorer
- Disconnect a stalled removable drive
Establish the scope
Confirm when explorer says not responding and whether folders open slowly. Note the exact time and the last relevant change, then compare the closest known-good device, account, connection, or application using the same task.
Apply the safer fix first
Test a simple local folder, clear Explorer history, and open This PC instead of Home if recent remote locations stall.
- Record the current state related to restart windows explorer.
- Apply the narrow change, then check whether explorer says not responding.
- Continue only if the result still points toward shell extension.
Investigate the cause
Use a clean boot to isolate shell software, check storage health, and run SFC if other Windows shell components fail.
Protect the recovery path
Before work that could affect storage & interface, protect relevant files and sign-in or recovery credentials. Keep the original error wording and the results involving unavailable network path, shell extension, storage error for support.
Verification
- Repeat the affected task under the same conditions used to confirm explorer says not responding. Confirm the symptom is gone, not merely that a Windows status label changed.
- Repeat the relevant connection, startup, sign-in, sleep, application, or device transition and specifically check whether folders open slowly.
When to stop
Do not continue with broader resets when a drive disconnects, reports errors, or holds irreplaceable data. Preserve the observations already collected and use the device maker, network administrator, Microsoft support, a qualified repair technician, or data-recovery help according to the evidence.
Review the safe troubleshooting workflow before any broader recovery step.