Fix Acrobat Pro DC Crashing When Opening Second PDF on Windows 10
Question details
Adobe Acrobat Pro DC abruptly crashes with an application error when users attempt to open a second PDF document or combine multiple PDFs.
- Product
- Adobe Acrobat Pro DC
- Device & OS
- Windows 10
- Scenario
- Opening an additional PDF document in a new tab, combining multiple PDF files, or performing any action that triggers a second document to load.
- Observed behavior
- The application crashes immediately. The Windows Event Viewer logs an Application Error pointing to the D3D9.DLL module, which persists even after reinstalling Acrobat and updating the NVIDIA graphics driver.
Save your work and ensure you have administrative privileges on Windows 10, as you will need to modify application preferences and potentially reinstall graphics drivers.
Disable Hardware Acceleration and Protected Mode
Turning off hardware acceleration prevents Acrobat from using the GPU for rendering, which often bypasses the D3D9.DLL graphics conflict.
The D3D9.DLL file is related to Microsoft DirectX graphics rendering. When Acrobat attempts to open a second PDF, a conflict between its rendering engine and your graphics driver can trigger a fatal crash.
Launch Adobe Acrobat Pro DC and open only one PDF file to prevent a crash. Go to the top menu, click 'Edit', and select 'Preferences'.
Navigate to the 'Page Display' or 'General' category on the left panel. Locate the 'Rendering' section and uncheck 'Use page cache' and 'Use 2D graphics acceleration' (or 'Use hardware acceleration when available').
Select 'Security (Enhanced)' from the left menu. Uncheck 'Enable Protected Mode at startup' and toggle off 'Enhanced Security'.
Click 'OK' to save your settings. Completely close Acrobat Pro DC, reopen it, and attempt to open a second PDF file to verify the fix.
Perform a Clean Installation of Graphics Drivers
Standard driver updates sometimes leave corrupted profile files behind. A clean installation completely wipes the old D3D9.DLL references and installs a fresh driver.
Collect Logs and Contact Adobe Support
If the crash persists after adjusting preferences and cleanly installing drivers, escalating the issue to Adobe with precise error logs is necessary.
Open and Combine Multiple PDFs Smoothly with WPS Office
If Acrobat continues to crash due to graphics driver conflicts on Windows 10, try WPS Office. It features a lightweight, stable, and highly compatible PDF editor that handles multiple document tabs and file combinations without overloading your system's rendering engine.
- 1. Download WPS Office: Download and install the free version of WPS Office on your Windows 10 computer.
- 2. Open Your First PDF: Launch WPS Office, select 'PDF' from the home screen, and open your initial document.
- 3. Add Additional PDFs Securely: Click the '+' icon on the top tab bar to securely load a second PDF, or use the 'Merge PDF' tool to combine documents without rendering errors.
Frequently Asked Questions
What is the D3D9.DLL file and why does it crash Acrobat?
D3D9.DLL is a Microsoft DirectX file used for rendering graphics and hardware acceleration. Acrobat utilizes it to speed up the display of complex PDF pages. If the file is corrupted or conflicts with your current graphics driver, requesting additional resources by opening a second PDF triggers a crash.
Will disabling hardware acceleration in Acrobat slow down my computer?
Disabling hardware acceleration forces Acrobat to use your CPU instead of your GPU to render PDF files. On most modern processors, you will barely notice a difference in speed, but it effectively resolves GPU-related crashing issues.
How do I find my Acrobat build number to report a bug?
Open Adobe Acrobat Pro DC, click on the 'Help' menu at the top, and select 'About Adobe Acrobat Pro'. A pop-up window will appear displaying the software version and the specific build number you need for support tickets.
Are there other ways to combine PDFs if Acrobat won't work?
Yes. If Acrobat Pro DC consistently crashes when combining files, you can use alternative desktop software like WPS Office, which includes a dedicated PDF merge feature, or utilize secure online PDF combination tools.
