Microsoft Office Web Components 11.0 is a legacy, deprecated technology originally released with Office 2003. Microsoft no longer provides standalone public downloads for OWC 11.0, and it is not safe or legal to download these components from third-party file-sharing sites. Using outdated, unsupported components can expose your system to security vulnerabilities.
Would you like guidance on migrating a specific legacy component (spreadsheet, chart, pivot table) to a modern web technology? microsoft office web components 11.0 library download
If you need to open an old file or application that expects OWC 11.0, the safest path is to run an with Windows XP or Windows 7 and Office 2003 — disconnected from the internet. Microsoft Office Web Components 11