If you still need the actual Jet 4.0 redistributable for an air-gapped legacy system, search for on an archive site (but understand the security risks).
| Problem | Solution | |---------|----------| | "Provider not found" on 64-bit OS | Your app is 64-bit but Jet is 32-bit. Recompile app to x86 or install ACE. | | "Cannot open database" | Ensure file permissions and that file is not locked by another process. | | "Unrecognized database format" | The file is newer than Jet 4.0 (e.g., Access 2007/2010 .accdb). Use ACE provider. | | "Cannot install ACE due to Office" | Use the 32-bit ACE if you have 32-bit Office; or uninstall/reinstall matching bitness. | download microsoft jet oledb 4.0
To directly answer the core question: The component is an integral, 32-bit-only part of the Windows operating system. Attempting to force it to work in modern 64-bit environments is an exercise in frustration. If you still need the actual Jet 4