Virtualization: Windows 32-bit i686 guest not working on Fedora 39 x86_64 ?

[Franta Hanzlík]

After 'dnf system-upgrade...' my machine from F37 x86_64 to F39, win7-32 
guest did not start due to BSOD 0x0000007B boot problem, while win10 
64-bit works fine on the same machine.

I then tried:

- a newly created virtual machine consisting only of Win7-32 or Win10-32 
installation ISO image freezes after start on the first inquiry window 
- the keyboard and mouse do not respond.

- the same way created virtual win10 64-bit installation CD ISO works 
correctly.

- I received the same behavior on a cleqan, freshly installed F39 system 
 - Win7 or Win10 32-bit did not work, but 64-bit without problems.

- on a new installation of F38 - Win7 guest works without problems, 
as well as both guest installations of 32-bit windows from the CD ISO 
image.

On F38 is libvirt-daemon-9.0.0-4.fc38.x86_64 + qemu-kvm-7.2.8-1.fc38.x86_64
On F39 is libvirt-daemon-9.7.0-2.fc39.x86_64 + qemu-kvm-8.1.3-4.fc39.x86_64

Does anyone have any idea where the problem could be?
-- 
Thanks, Franta Hanzlik