The transition from pressing the power button to seeing your login screen involves several critical phases:

If you are reinstalling Windows or running a recovery tool, you must boot from an external USB drive.

This stage loads critical drivers and the Windows kernel into memory.

| Manufacturer | BIOS Key | Boot Menu Key | | :--- | :--- | :--- | | | F2 | F12 | | HP | F10 / ESC | F9 / ESC | | Lenovo | F1 / F2 | F12 | | ASUS | F2 / Del | F8 / ESC | | Acer | F2 | F9 | | Custom PC | Del (usually) | F11 / F12 |

Select the USB drive from the list to start the Windows 10 setup.