for tia portal software, you can read the endest point of this article and might effortlessly download from there.
SIEMENS PLC PROGRAMMING SOFTWARE
STEP BY STEP 'TIA PORTAL INSTALLATION'
Download "TIA Portal v13 from below in different parts, I have divided it into several (3 or 4) because of it's size. So you have to download all the parts from below. The software TIA Portal v13 is uploaded in Mega Cloud Storage platform.
Open file named "SIMATIC STEPS-7 V13 PROF by [Tiaportal.weebly.com]" and open setup with named "Start". Give it permission as admin, to start installation. See below pictures.
Open next folder named "SIMATIC STEPS 7 PLCSIM PROF" and open installation setup with Start icon.
Your installation of second setup will begin. Click next, next and next.