After getting problems with two ArcaOS installations, I started a new installation of ArcaOS 5.0.6. Meanwhile, installation really runs fine on my two computers. But I wonder why on the one computer, the default Arca Noae Platform setting (Manage - Platform) is "pentium4", on the other "i686". Only on the "i686" computer, OpenOffice 4.1.8 works. On the "pentium4" computer, it ends with the 2nd start screen (User Name). I did not install any other software on both systems. The main difference (besides another manufacturer of the AMD4 motherboard) is that the one which works ("i686") has got a Ryzen 2200G 4 core APU without Hyperthreading (= 4 threads), and the one where I have got the problems ("pentium4") is a Ryzen 3400G 4 core with Hyperthreading (= 8 threads), and more clock speed.
Is it possible that ArcaOS does not like Hyperthreading (sorry, I cannot turn it off on the BIOS) and switches back to the more secure "pentium4"?
Can I force i686 while installing ArcaOS ? I did not find a setting in the installation routines.