If the PC-DNA USB doesn’t appear in the Boot Menu, don’t worry – this is common and usually takes 1-2 quick settings adjustments in BIOS.
Follow these steps in order:
Step 1 – Re-insert the USB and try another USB port
Sometimes BIOS only detects specific ports, especially older systems.
Try USB 2.0 — BIOS detects those more reliably.
Try:
- Switching to a different USB port
- Preferably a USB 2.0 port (usually black, not blue)
Restart and open the Boot Menu again.
Step 2 – Disable Secure Boot
Secure Boot may block unsigned USB devices from appearing.
If Secure Boot is ON — the USB may stay hidden. Disable it.
Look for:
- Secure Boot
- Security
- Secure Boot Control
Set it to disable.
Press F10 → Save & Restart, then open Boot Menu again.
Step 3 – Change Boot Mode (UEFI ↔ Legacy/CSM)
Some computers only show USB options depending on the selected boot mode.
If USB isn’t visible – switch between UEFI and Legacy/CSM
Switch between:
- UEFI → Legacy / CSM
- Or if already in Legacy → switch back to UEFI
Press F10 → Save & Restart, then open Boot Menu again.
Step 4 – Enable USB Boot
On some systems USB booting is disabled by default.
Look for:
- Boot Options
- Boot Configuration
- USB Boot
- External Device Boot
Set it to:
Enabled
Press F10 → Save & Restart, then open Boot Menu again.
If the USB Still Doesn’t Show Up
Try:
- Another USB port
- Another laptop/PC (just to confirm BIOS sees it elsewhere)
If it appears on another device — the problem is 100% BIOS settings on the original machine.
Next Steps
Once the USB appears in the Boot Menu, select it and continue