https://community.graphisoft.com/t5/Installation-update/Old-versions-of-AC-on-Windows-8-1/m-p/179626#M19623 <DIV class="actalk-migrated-content">You can try but there is no guarantee it will run. AC 16, 17 and 18 are the only officially supported ArchiCAD versions for Windows 8.1:<BR /><BR /><A href="http://helpcenter.graphisoft.com/technotes/operating-systems/compatibility-notes-to-archicad-on-windows-8-1/" target="_blank" rel="noopener">http://helpcenter.graphisoft.com/technotes/operating-systems/compatibility-notes-to-archicad-on-windows-8-1/</A></DIV> Tue, 26 Mar 2024 16:20:15 GMT Laszlo Nagy 2024-03-26T16:20:15Z https://community.graphisoft.com/t5/Installation-update/Old-versions-of-AC-on-Windows-8-1/m-p/179626#M19623 <DIV class="actalk-migrated-content">You can try but there is no guarantee it will run. AC 16, 17 and 18 are the only officially supported ArchiCAD versions for Windows 8.1:<BR /><BR /><A href="http://helpcenter.graphisoft.com/technotes/operating-systems/compatibility-notes-to-archicad-on-windows-8-1/" target="_blank" rel="noopener">http://helpcenter.graphisoft.com/technotes/operating-systems/compatibility-notes-to-archicad-on-windows-8-1/</A></DIV> Tue, 26 Mar 2024 16:20:15 GMT https://community.graphisoft.com/t5/Installation-update/Old-versions-of-AC-on-Windows-8-1/m-p/179626#M19623 Laszlo Nagy 2024-03-26T16:20:15Z