Hi, today I removed virtualbox6.1-bin 6.1.50 and installed virtualbox 7.0.16, because 6.1.50 doesn't work anymore [1] and I got rid of fixing virtualbox 6+ again and again. Doing a first short test a Windows 10 guest seems to run, but a Windows 11 guest seems to cause issues, at least a shutdown of the Windows 11 guest with _not_ updated guest additions didn't finish and locked the host or rather it was possible to push Ctrl+Alt+F2 and to run pkill VirtualBoxVM to get back a responding Arch Linux host. For other reasons I'm restoring another backup of Windows 11, which will take more than an hour, since the the vdi's size is > 700 GiB, so in the meantime I want to gather information. I will take a look at the settings mentioned by the Arch Wiki [2], [3]. Are there more settings I can check? It's an Intel CPU wit integrated GPU. • rocketmouse@archlinux ~ $ hwinfo --cpu | sort -u | grep Model Model: 6.191.5 "13th Gen Intel(R) Core(TM) i3-13100" • rocketmouse@archlinux ~ $ hwinfo --memory | grep Size Memory Size: 32 GB Regards, Ralf [1] "Could you still start Windows guests with virtualbox6.1-bin 6.1.50-1 or do you also experience guru meditations? I'm currently trying extra/virtualbox 7.0.16-1, which gets rid of the gurus, but so far a Windows 11 guest is not doing well." - https://aur.archlinux.org/pkgbase/virtualbox6.1-bin#comment-968033 [2] "4.11.1 Creating the virtual machine A VirtualBox virtual machine must be manually created. As of now do not add any storage device any disk to the virtual machine, it will be done manually later. Configure the virtual machine with the following settings (settings panel can be opened by clicking the "Settings" button in the main toolbar): View: System: Tab: Motherboard: mark Enable I/O APIC; mark Enable EFI; mark Hardware Clock in UTC Time if is your case. Tab: Processor: mark Enable PAE/NX; mark Enable Nested VT-x/AMD-V; Tab: Acceleration: Choose the paravirtualization interface Hyper-V from the drop down menu; mark Enable Nested Paging. Optionally you can enable also the following settings: View: Display Tab: Screen mark Enable 3D Acceleration. Note that it could cause glitches. Note: The Hyper-V setting is not required in order for the system to operate correctly, but it may help avoid licensing issues." - https://wiki.archlinux.org/title/VirtualBox#Creating_the_virtual_machine [3] "5.22 Random freezing in guests with Intel GPU With Intel CPU and graphics, allocating more processors for the guest can lower render performance, thus cause random freezing. Allocating less processors can help." - https://wiki.archlinux.org/title/VirtualBox#Random_freezing_in_guests_with_I...