1. It is suggested that you can always click the F 10 key to enter the bios when booting (or restarting).
2. Find the startup sequence in the system configuration options-startup options, setting usb hard disk-as the first;
3. Save on Exit-Exit to save changes-Yes and exit.
You can refer to the method of installing the system with USB flash drive on Microsoft website:
You can also refer to the way Microsoft provides to make a startup USB flash drive:
For more information about HP products and after-sales technical support, please visit www.hp.com.cn/chat,, the online chat room of HP for further consultation.