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I installed Virtual Box 6.1.32 on a host with Windows-11 Pro (build 22000.613), 11th Gen Intel(R) Core(TM) i7-11800H @ 2.30GHz , 40 GB RAM, 1TB SSD, Hyper-V disabled (not installed)

I tried to install windows 10 Pro guest using keys purchased from Microsoft and ISO downloaded from Microsoft using the download tool.

Initially I tried with 8 GB of memory and 4 CPUs. EFI was not ticked, 3D acceleration was along with 128 MB for display and a fixed 50GB virtual disk. It took a long time to display even the initial setup window (more than 5 minutes). Each step thereon took a long time.

Finally after a number of tries deleting and creating many VMs, I found that it works far better (faster) with a single CPU. With more than 1 CPU, it is almost unusable. But even with a single CPU, the installation fails in between and somehow it booted to windows-10, but it crashes every few minutes and reboots. Tried to install windows updates, but never completed because the guest was crashing too quickly. Installed guest additions somehow - but issue persists (guest crashes and reboots).

I then uninstalled Virtual Box and installed a virtual machine with Hyper-V using the same installation iso file. It installed quickly and runs fine!

Virtual box on windows-11 host has serious issues that makes it unusable. Is there a solution for this? Has anybody run virtual box on windows-11 host and tried windows-10 guest?

Yes, I have been running a Windows 10 guest on a Windows 11 host since before the official release of Win 11. It runs pretty much the same as it did on a Windows 10 host.

Although you had not enabled Hyper-V, my guess is that the Windows hypervisor was loaded. If the vm's window shows a green turtle instead of the normal white V on a blue background, that is your problem. It is not unique to Windows 11, it happens on Windows 8 and 10 as well. It is a known issue and well documented. See this post.

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