Qubes 4.0.3 - after installation sys-firewall failed

Hi all,
I need your help.
I’m a newbie.
I have decided to install qubes on my new notebook.
I downloaded the iso and copied it to a pendrive.
I started the installation.
I followed all the directions.
After the installation, I rebooted and I had to switch off with the PC button.
On reboot this message appeared

[’/usr/bin/qvm-start’ ‘sys-firewall’] failed:
stdout: “”
stderr: "Start failed: internal error: Unable to reset PCI device 0000:03:00.1:
internal error: Active 0000:03:00.0 devices on bus with 0000:03:00.1, not
doing bus reset. see /var/log/libvirt/libxl-driver.log for details

I click on ok, I typed the passphrase and I did what requested.
I went to Service: sys-net, I opened sys-net: Qube Settings, I went to Devices and added the required entry.
I tried to update dom0 and this message appeared

Can anyone help me to solve this problem?
Where did I go wrong ?!
Thanks in advance for your help

Are you certain, that virtualisation is enabled on your machine?

(@theo, I’ve made the title a bit more specific so others with the same issue can find it.)