I just re-installed Windows 10 in my machine and then proceeded to install Archicad. However things were far from smooth.
For some reason the application showed an error right at the end of the installation process (I cannot remember what message was showed), and so Archicad did not install completely. However, I also cannot uninstall it, because it does not show in the list of installed software.
I tried repairing it, also to no avail. The following error appears right at the end of the process ( I translated the message from Portuguese, so it might not be exactly the same in English):
"Error. Error while installing C:/Program Files//Uninstall.AC/Uninstall.dat. The application will now terminate."