Why does my laptop Aspire 17 not boot into Ubuntu after installation ?

curano
curano Member Posts: 22 Networker

I installed Ubuntu on a brandnew Aspire 17.
Installation completed.
When I reboot the system turns back to a Windows Installation procedure.
I didn't find any thing in BIOS to fix this.
This is not a dual boot, just Ubuntu 24.04 alone.

Any ideas ?