If your application is compiled as Any CPU , it will run as 64-bit on a 64-bit OS and look for the 64-bit Oracle driver, causing a crash. You must change your application’s compilation target from Any CPU to x86 in Visual Studio to force it to use the 32-bit Oracle Client 11.2.0.4. Error 3: OLE DB Provider OraOLEDB.Oracle Not Registered
Before clicking any download links, you need to understand the anatomy of this software. oracle client 11204 download 32 bit work
If your application depends on specific administrative utilities or interactive setup tools, you will need the full graphical archive. Go to the Oracle My Support portal. If your application is compiled as Any CPU
If you need a minimal footprint (e.g., for a single Python script or a small C# app), download the Instant Client instead: download the Instant Client instead: