Look for the ... ArchiCAD 13-Win32 ... folder on the installation DVD and run the setup file in there.
Barry.
One of the forum moderators.
Versions 6.5 to 26
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11