How to Fix Windows Explorer Crashes When Loading PDF Thumbnails
Question details
The user is experiencing Windows Explorer crashes, freezing, or 'internal error' messages when trying to view PDF thumbnails in folders.
- Product
- Adobe Acrobat
- Device & OS
- Windows
- Scenario
- Navigating through Windows Explorer folders that contain large amounts of PDF files with thumbnail previews enabled.
- Observed behavior
- Windows Explorer (explorer.exe) crashes, freezes, or displays an 'An internal error has occurred' message generated by Acrobat when rendering the PDF thumbnails.
Before troubleshooting, ensure you have saved all open documents and closed any active instances of Windows Explorer and Adobe Acrobat to prevent data loss during process restarts.
Disable the Adobe Acrobat Extension in Google Chrome
Conflicts between Acrobat DC and its Google Chrome browser extension often cause Windows Explorer to crash during thumbnail generation.
Many users report that the background processes shared between the desktop Acrobat application and the Chrome extension can conflict, leading to severe explorer.exe crashes when loading previews.
Launch Google Chrome, click the three-dot menu in the top right corner, and navigate to Extensions > Manage Extensions.
Locate the Adobe Acrobat extension in your installed extensions list and click the toggle switch to turn it off.
Press Ctrl + Shift + Esc to open Task Manager. Find Windows Explorer in the Processes tab, right-click it, and select Restart to refresh the system.
Repair or Update Adobe Acrobat
Corrupted installation files or known bugs in specific versions of Acrobat can trigger internal errors when rendering file previews.
Shorten Filenames and Isolate Corrupt PDFs
Excessively long file names or a single corrupted PDF document can cause the thumbnail generator to freeze the entire directory.
Use WPS Office as a Stable Alternative for PDF Viewing
If your current PDF reader continues to cause Windows Explorer to crash, consider switching to WPS Office. It includes a powerful, lightweight PDF reader that integrates seamlessly with Windows, offering fast thumbnail previews without heavy system resource usage or freezing bugs.
- 1. Install WPS Office: Download and install WPS Office Free from the official website.
- 2. Change Default PDF App: Right-click any PDF file on your computer, select 'Open with', and click 'Choose another app'.
- 3. Set WPS as Default: Select WPS Office from the list, check the box that says 'Always use this app to open .pdf files', and click OK to fix thumbnail handler conflicts.
Frequently Asked Questions
Why does Windows Explorer crash only when opening PDF folders?
When you open a folder, Windows Explorer attempts to generate visual thumbnail previews for every file using the default PDF handler. If that handler software has a bug, corrupted code, or conflicts with extensions, the rendering process fails and brings down the explorer.exe process with it.
How do I completely turn off PDF thumbnails to stop the crashing?
Open Windows File Explorer, click the 'View' tab, and select 'Options' to open Folder Options. Go to the 'View' tab within the new window, check the box labeled 'Always show icons, never thumbnails', and click Apply.
Can browser extensions really affect Windows Explorer?
Yes. Certain browser extensions, like the Adobe Acrobat extension for Google Chrome, share background processes and integration components with the main desktop application. Conflicts between these shared components can disrupt Windows File Explorer's ability to safely render file thumbnails.
