openSUSE Leap 15.4 KDE Plasma Version: 5.26.4 KDE Frameworks Version: 5.101.0 Qt Version: 5.15.7 Kernel Version: 5.14.21-150400.24.38-default (64-bit) VirtualBox 7.0.4. I'd been running Windows 10 as guest for several years, successful and solid. Recently upgraded to Windows 11 as guest, also successfully. Now, all of a sudden and for no reason I can account for, VBox flatly refuses to run. I can't even start it to re-install guest(s). Calling it from a commandline produces this (sorry about the line wrap): Qt WARNING: QObject::connect: No such signal UITabBar::currentChanged(int) Qt WARNING: QObject::connect: No such signal UITabBar::tabMoved(int,int) Qt WARNING: QObject::connect: No such signal UITabBar::tabBarClicked(int) Qt WARNING: QObject::connect: No such signal UITabBar::tabBarDoubleClicked(int) /usr/bin/VirtualBox: line 70: 15387 Segmentation fault (core dumped) LD_LIBRARY_PATH="/usr/lib/virtualbox${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}" /usr/lib/virtualbox/VirtualBox6 $@ Is there anything (simple!) I can do about that? -- Robin K Wellington "Harbour City" New Zealand