The first step in the installation process is acquiring the software, which requires strict adherence to licensing protocols. Unlike modern subscription models or open-source software, TIA Portal is proprietary. The only legitimate source for downloading TIA Portal V12 SP1 is the Siemens Industry Online Support (SIOS) portal or the Siemens Digital Industries Software download center.
If the installer keeps asking you to reboot your computer, you may need to delete the "PendingFileRenameOperations" key in the Windows Registry ( HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager ). tia portal v12 sp1 install download