Dell vostro 14 3000 seems to be setting up some Microsoft functions. After clicking Next, it will be like this.

First, insert the prepared boot USB disk, press "del" after booting to enter the bios main menu interface, and use the "←→" arrow keys on the keyboard to move the cursor to the "boot" menu column, and then use the "↑↓" on the keyboard to move to the bottom "Hard Drive BBS Priorities" option and press the Enter key

After pressing the Enter key, change the "Boot Option # 1" corresponding boot item is changed to USB boot, KingstonDataTraveL.... is the prepared boot USB disk, and SATA: WDC WDS000AA... is the hard disk in the chassis. According to the shortcut key prompts in the lower right menu bar, change the Change the first option to the position of the red box

After selecting, press "ESC" to return to the previous interface and then check in the second to last line at the bottom whether the setting behind "Boot Option #1" is "KingstonDataTraveL." ...

After confirming, press F4 to save the changed settings (usually other machines save by pressing F10. You can try which one to press), and a "save changes and reset" message will pop up. " prompt asks you whether to save, just select "YES" here, then the computer will automatically restart, and then it will automatically enter the startup interface of Laomaotao v5.0!