While this article helps you download Update 5, a critical question:
: Download all split archive parts (.001, .002, etc.) into a single folder before running the .exe installer. Compatibility Note tia portal v11 sp2 update 5 download updated
: Update 5 typically includes all improvements from previous updates (Updates 2, 3, and 4). Critical Compatibility Notes TIA portal V11 SP1 - SiePortal - Siemens The Legacy Labyrinth: A Guide to TIA Portal
Are you running this on or an older OS like Windows 7 , as V11 has known compatibility limitations with modern systems? TIA Portal V11 SP2 Update5 - SiePortal - Siemens Critical Compatibility Notes TIA portal V11 SP1 -
: Better input and indication for 32-bit variable values. Installation Notes