How to Fix Acrobat Thumbnail View Crashes and Screen Flickering
Question details
The user experiences application crashes, screen flickering, and duplicate background processes when enabling PDF thumbnail previews.

- Product
- Adobe Acrobat
- Device & OS
- Windows
- Scenario
- Viewing PDF files as thumbnails within Windows File Explorer or the Adobe application.
- Observed behavior
- Enabling PDF thumbnails causes screen flickering, unexpected crashes, and generates duplicate Acrobat processes running in the background.
Ensure you have saved all open documents and closed any active PDF files, as you will need to restart your computer and adjust system graphics settings.
Update Acrobat and Graphics Drivers
Outdated software or incompatible graphics drivers are common causes of rendering issues and screen flickering.
Keeping your PDF viewer and display drivers up to date ensures compatibility with the latest Windows updates, which often resolves display glitches.
Open Adobe Acrobat, navigate to the 'Help' menu at the top, and select 'Check for Updates'. Follow the prompts to install any available patches.
Right-click the Windows Start button and select 'Device Manager' from the context menu.
Expand the 'Display adapters' category, right-click your graphics card, and choose 'Update driver'. Select 'Search automatically for drivers'.
Restart Windows to apply the driver updates and test if the screen flickering persists when viewing PDF thumbnails.

Adjust Acrobat Rendering and Security Settings
Hardware acceleration or protected mode settings can sometimes conflict with your system, leading to crashes and duplicate processes.
Repair or Reinstall Adobe Acrobat
If core application files are damaged, repairing or performing a fresh installation can fix recurring crashes without needing to reset Windows.
Try WPS Office: A Lightweight, Crash-Free Alternative
If you continue to experience system freezes, screen flickering, or high resource usage with standard PDF viewers, switch to WPS Office. It includes a fast, lightweight, and robust PDF reader and editor that handles thumbnails effortlessly without crashing your system.
- 1. Download WPS Office: Visit the official WPS website to download and install the free, lightweight WPS Office suite.
- 2. Set as Default Viewer: Right-click any PDF file, select 'Properties', and change the default 'Opens with' application to WPS PDF.
- 3. Browse Without Crashes: Open your local folders and smoothly navigate your PDF thumbnails without worrying about unexpected crashes.

Frequently Asked Questions
Why does my screen flicker when I open a folder containing PDF files?
Screen flickering usually occurs when Windows Explorer struggles to generate thumbnail previews via the installed PDF viewer's shell extension. This is often caused by an outdated application version or a conflict with your display drivers.
How do I temporarily turn off PDF thumbnail previews in Windows?
Open File Explorer, click the 'View' tab, and select 'Options' to open Folder Options. Under the View tab, check the box that says 'Always show icons, never thumbnails', then click Apply and OK.
Can duplicate PDF background processes cause my computer to slow down?
Yes, if an application fails to close properly, multiple background processes can accumulate and consume significant amounts of RAM and CPU. You can manually end these duplicate tasks by opening the Windows Task Manager (Ctrl + Shift + Esc) and selecting 'End Task' on the unresponsive processes.
Do I need to reset Windows to fix PDF software crashes?
No. Resetting Windows is an extreme measure and should not be required for a PDF viewer issue. You should first try updating your graphics drivers, repairing the PDF software installation, or switching to a more stable alternative like WPS Office.




