@Fassou:
If you leave the HDD before the USB, and when you start up you press the Multi-Boot key (F11 on many motherboards) to indicate the stick, you get it to boot from USB, only the first time.
Salu2!
PD: Remember that you can load the default values in BIOS, if you want to recover the original state.
Thanks Fassou. Yes, I know that by default the default values are loaded, but they are not the most suitable, right? Or can I record a profile and save it to recover it?
In relation to this, it turns out that this half day I turned off the PC and disconnected it from the power, and when I turned it back on after 20 minutes or so, the BIOS had reset again. I called the store where I bought it and they told me to activate the XMP profile in BIOS, and to turn it off and disconnect it from the power again to see if it would reset again. It turns out that I turned it off and disconnected it from the power for a good while and it didn't reset again. According to my seller, this could have happened because after the power outage, the XMP profile wasn't configured, and at startup the PC may have found conflicting configurations. He says that if it were to reset every time, it would be the battery. The PC is 3 days old.
What do you think about the causes of that reset after being disconnected from the outlet?
Regards.