Allow yourself enough time for the upgrade, do not upgrade the OS close to a deadline.
Return all borrowed licenses before upgrading the OS.
Upload all Software keys to the License Pool.
This means that you have to re-install all your software applications and migrate all your data after installing the system. When switching from 32-bit to 64-bit, you need to perform a clean install of Windows.
Back up all of your data, including ARCHICAD / BIM Server specific data before upgrading the operating system.
Study the Windows 8 and Windows 8.1 articles for any known issues, difficulties.
GRAPHISOFT products are supported on Pro and Enterprise editions and are compatible with Home and Educational editions. Not supported versions ARCHICAD 24 ARCHICAD 23 Operating System branch compatibility Based on GRAPHISOFT's experiences ARCHICAD 15 works well on Windows 8.1. As a result of this there is no official support for operating system specific problems.
ARCHICAD 15 and older versions may be run on Windows 8.1, though these were designed to work with older versions of the operating system.
ARCHICAD 22 may be run on Windows 8.1, but it is not tested by GRAPHISOFT on this platform, so there is no official support for operating system specific problems.
ARCHICAD 16, 17, 18, 19, 20, 21 and connected products (BIMcloud, BIMx, BIM Server, BIM Server Manager) are supported on Windows 8.1.