Symptoms
- Windows desktop icons and taskbar disappear briefly then return
- Finder or Explorer window freezes when opening a certain folder
- Explorer restarts itself automatically
- Right-click menu takes a long time to appear or freezes it
Likely causes
- CommonCorrupted thumbnail cacheExplorer generates image previews that can become corrupted over time.
- CommonA specific folder with a problem fileA single corrupted or oddly-named file can crash the file browser when it tries to preview it.
- CommonThird-party shell extension or right-click add-onExtensions that add right-click menu options can conflict with the file browser.
- PossibleCorrupted system filesDeeper file browser instability can stem from damaged core system files.
- PossibleExternal or network drive not respondingBrowsing to a slow or disconnected network location can freeze the whole window.
What to do
- Restart Explorer or Finder from Task Manager/Activity Monitor without restarting the whole computer.
- Clear the thumbnail cache from disk cleanup settings (Windows) or by rebuilding it (Mac).
- Try opening folders one at a time to identify if a specific folder triggers the crash.
- Disconnect any external or network drives temporarily to see if one is causing the freeze.
- Disable recently installed shell extensions or right-click add-on tools.
- Run a system file check tool to repair corrupted system files.
- Restart the computer fully if crashes continue.
When to call a pro
If crashes point to failing storage hardware, back up your files immediately and have the drive checked.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.