If you require this specific version for maintaining legacy systems, you should open a Support Request with Siemens Industry Online Support (SIOS); they typically provide installation files to customers upon request for valid maintenance needs. Installation Requirements
Before downloading and applying Update 3, ensure your system meets the following software baseline: Tia Portal V11 Sp2 Update 3 Download
To download the TIA Portal V11 SP2 Update 3, follow these steps: If you require this specific version for maintaining