Update 4 is not a standalone installer. You must have TIA Portal V13 SP2 already installed before applying this update. It is a delta package that patches existing files.
The is a critical maintenance release for Siemens automation software, designed to enhance system stability and ensure compatibility with modern operating systems like Windows 10. Released in mid-2020, this cumulative update consolidates previous fixes and security patches for STEP 7 and WinCC V13 SP2 environments. Key Features and Improvements Tia Portal V13 Sp2 Update 4
Update 4 focuses on refining the engineering experience and resolving reported stability issues. Key enhancements include: Update 4 is not a standalone installer