Boot method: USB
Image version: https://cdimage.debian.org/images/.bookworm_release/debian-cd/i386/iso-cd/debian-edu-12.0.0-i386-netinst.iso
Date: 2023. Jun. 10.

Machine: ASUS A7N8X2.0
Processor: Athlon XP 2600+
Memory: 2.5GB

Base System Installation Checklist:
[O] = OK, [E] = Error (please elaborate below), [ ] = didn't try it

Initial boot:           [O]
Detect network card:    [O]
Configure network:      [O]
Detect media:           [O]
Load installer modules: [O]
Detect hard drives:     [O]
Partition hard drives:  [O]
Install base system:    [O]
Clock/timezone setup:   [O]
User/password setup:    [O]
Install tasks:          [E]
Install boot loader:    [ ]
Overall install:        [ ]

Comments/Problems:
The installer told me that the machine doesn't have SSE2 and that it
is sorry about it.
I forgot to click the Screenshot button, but I took a photo with my
phone. It is in the zip with the logs.
When I clicked Continue, it continued the installation. But at the end
it showed an error telling that the installation has failed.
Screenshot included, this time I clicked the button.

From the logs it is visible that two packages are requiring SSE2:
texlive-binaries
libqt5webenginecore5:i386

In the future, qt5 will require SSE3 due to Chromium.

The documentation says that it is enough to have a 400MHz CPU,
although it isn't.
https://wiki.debian.org/DebianEdu/Documentation/Bookworm/Requirements

Also, here it should be added too that i386 requires SSE2:
https://wiki.debian.org/DebianEdu/Documentation/Bookworm/Installation

Some more info:
I was using the Standalone profile with LXQT.

Since then I've tried to install it with LXDE instead, as it doesn't
require SSE2. But SSE2 is still required, most probably because some
other package still requires QT5.

Here are the logs (attached in the zip) for an install with LXDE.
The same packages are affected.

Although, I have to mention, that normal Debian 12 with LXDE installs
fine on the same machine.