Fix Adobe Acrobat X Installation Error 1911 on Windows Server
Question details
The user needs to resolve Error 1911 caused by a type library registration failure when installing Adobe Acrobat X Standard on a Windows Server environment.

- Product
- Adobe Acrobat X Standard
- Device & OS
- Windows Server 2012, Windows Server 2008 R2
- Scenario
- Installing legacy PDF software on a Windows Server.
- Observed behavior
- The installation process halts with Error 1911, indicating an inability to register a specific type library, preventing the successful setup of the software.
Ensure you are logged into your Windows Server with full Administrator privileges and check your server's current Windows Update history before making any system modifications.
Uninstall Windows Update KB3072630
Removing this specific Windows Update resolves known conflicts with the Windows Installer service that trigger Error 1911 during older software installations.
Windows Update KB3072630 introduces changes to the Windows Installer behavior which can block legacy applications like Acrobat X from successfully registering type libraries. Removing this update temporarily allows the installation to complete.
Click the Start menu, type 'Control Panel', and press Enter. Navigate to 'Programs' and click on 'Programs and Features'.
In the left-hand pane, click the 'View installed updates' link to display a list of all updates applied to your Windows Server.
Use the search bar at the top right to find 'KB3072630'. Right-click the update from the list and select 'Uninstall'. Follow the prompts to remove it.
Reboot your Windows Server. Once restarted, run the Adobe Acrobat X installer again as an administrator.

Bypass the Error by Ignoring Prompts
If uninstalling the update is not possible, ignoring the registry error during installation can often still result in a functional PDF reader.
Need a Modern, Error-Free PDF Solution? Try WPS Office
Legacy PDF software often struggles with compatibility on newer operating systems and servers. WPS Office offers a powerful, lightweight, and modern PDF tool alongside a full office suite, ensuring you can read, edit, and manage PDFs without frustrating installation errors.
- 1. Download the Installer: Visit the official WPS website and download the free WPS Office installation package.
- 2. Install on Windows: Run the lightweight installer. WPS Office installs quickly without triggering outdated registry or type library errors.
- 3. Set as Default PDF Reader: Open WPS Office, navigate to the PDF tool, and follow the prompt to set it as your default application for viewing and editing PDF documents.

Frequently Asked Questions
What causes Error 1911 during software installation?
Error 1911 typically occurs when the Windows Installer fails to register a type library for a specific file (.dll or .tlb) during the setup process. This is often caused by permission issues or conflicts with specific Windows Security Updates.
Is Adobe Acrobat X fully compatible with Windows Server 2012?
Adobe Acrobat X is an older software version and was not natively designed for Windows Server 2012. While it can often be installed using workarounds or compatibility modes, users may experience minor glitches or installation errors.
Will ignoring Error 1911 break my PDF software?
Not necessarily. Many users report that clicking 'Ignore' bypasses the specific type library registration failure, but the core functionalities of the software, such as viewing PDFs and utilizing the PDF printer, continue to work correctly.




