If you must use it for a legacy project (e.g., a VB6 or old VBA application), be aware of the following: Manual DLL Registration : Some users attempt to copy C:\Windows\SysWOW64 and register it using
Windows security policies frequently block unsigned or legacy ActiveX controls.
Resolving Microsoft Office Web Components 11.0 Library Download and Compatibility Issues
Scroll down and check .
Instead of fighting OWC 110, use these safe, modern libraries:
work with the 64-bit version of Office. You must use 32-bit Office to ensure compatibility. Modern Alternatives
Since the official Microsoft Download Center has removed the direct link, you must rely on archived sources or specific legacy installers. Official Office 2003 Media:
To make the library work on a modern 64-bit operating system, the files must reside in the correct system-accessible folders.
Ensure the target website is added to the Compatibility View settings within the IE mode configuration. Enabling ActiveX Controls
Select the tab, click on Trusted Sites , and click the Sites button to add your legacy application's URL.
Because the software is no longer supported, any vulnerabilities discovered after its lifecycle end are not patched by Microsoft. Historically, several security vulnerabilities have been identified in OWC that could allow remote code execution if a user visited a specially crafted web page containing malicious OWC controls. As recently as 2022, reports were still highlighting potential vulnerabilities in OWC 10. Using this outdated library in a modern web context could expose your system or network to significant security threats.
Publishing spreadsheets, charts, and database views to the web.
Run the owc11.msi installer using .