# How to Update BIOS under DOS Mode

Follow this step-by-step guide to update BIOS under DOS Mode on Qotom Mini PC. Boot from USB via F7/F11 boot menu, enter DOS interface and run the command F to initiate BIOS firmware flashing. Remember not to cut power during the upgrade.

### Step-by-Step Operation

1. Power on the mini PC. Press **F11 or F7** repeatedly during startup to bring up the boot menu, then select the bootable USB drive.

![](https://www.qotom.com/article/2026/265-02.png)
2. The device will boot and enter the DOS interface automatically.

![](https://www.qotom.com/article/2026/265-03.png)
3. Type the letter **F**, press the Enter key to start the BIOS refresh procedure.

> **Warning**: Do NOT disconnect power during BIOS flashing. Power loss may damage the firmware and render the mini PC unbootable.

Updated: 2026-09-17T11:50:19.54881+00:00

Source: https://www.qotom.com/support/how-to-update-bios-under-dos-mode