Symptoms
- File Explorer windows freeze or won't open
- Taskbar and Start menu become unresponsive to clicks
- Task Manager shows Windows Explorer as Not Responding
- Other open programs may continue to work while this happens
Likely causes
- CommonA specific folder or network location Explorer is trying to access is unresponsiveExplorer can hang trying to load a folder with a problem, especially a slow network share or a corrupted file.
- CommonToo many File Explorer windows or a very large folder being displayedExtreme numbers of files or windows can overwhelm Explorer's rendering.
- PossibleA faulty shell extension (like an add-in from cloud storage software or an archiving tool)Third-party shell extensions integrate deeply with Explorer and can cause it to hang.
- PossibleCorrupted thumbnail cacheA damaged thumbnail cache can cause Explorer to hang while trying to generate previews.
- Less commonOutdated graphics driverSince Explorer also renders the taskbar and desktop, a graphics driver issue can occasionally manifest this way.
What to do
- Open Task Manager (Ctrl+Shift+Esc), find Windows Explorer, right-click it, and choose Restart, which refreshes the taskbar and Explorer windows without a full reboot.
- If Explorer immediately hangs again, note which specific folder or window was open right before it happened, since a specific location may be the trigger.
- Avoid opening that specific network location or very large folder until you can address it directly; check if a specific file within it is the problem.
- Clear the thumbnail cache by running 'Disk Cleanup,' checking 'Thumbnails,' and cleaning it, then restart Explorer again.
- Check installed shell extensions using a tool like Microsoft's Autoruns (from Sysinternals) and disable recently added ones from cloud storage, archiving, or antivirus software to test.
- Update your graphics driver from the manufacturer's website.
- If Explorer hangs happen very frequently and broadly, not tied to a specific folder, run 'sfc /scannow' to check for corrupted system files.
Tools and parts
- Sysinternals Autoruns tool (optional, for advanced shell extension review)
When to call a pro
If restarting Explorer repeatedly doesn't help and a specific cause isn't obvious, a technician can use more advanced tools to identify a problematic shell extension or corrupted system component.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.