Owners of Xiaomi and RedmiBook portable hardware periodically face situations where standard upgrade methods do not work or the system stops running correctly, in which case the only right solution is to completely reflash the BIOS or reinstall the operating system from scratch, a process that requires care, because interference with low-level software carries certain risks.
Before you start taking action, you need to clearly understand the difference between updating UEFI and completely replacing the system image. Mistakes can lead to the device becoming a “brick” that can not be launched without specialized hardware. It is critical to make sure that the firmware version strictly matches the exact model of your laptop, including regional modification.
In this guide, we will take a look at all the preparation steps, the tools you need to work with, and the step-by-step algorithm for how to safely reset, where to look for official images, and what to do if the process goes wrong.
Preparation of equipment and software
The success of the operation depends on 90% of the quality of the pre-conditioning. You will need a stable power source, as the surge of voltage or battery discharge during the recording process in the EEPROM of the motherboard is fatal. The laptop must be connected to the network through the original power supply, and the battery level should be at least 60-70%.
The second critical component is the correct USB-It is advisable to use a small flash drive (up to 32 GB), formatted into a file system. FAT32. Old ports USB 2.0 is often more stable when running firmware BIOS, speed-connector USB 3.0, so it is recommended to connect the drive in them.
You also need to download specialized software. BIOS from American Megatrends or InsydeH2O, which are most often on the Mi Notebook, you may need WinFlash utilities or the command line. Windows system recovery will require ISO images and a program to write them, for example, Rufus.
☑️ Checklist before firmware
Do not ignore the integrity check of downloaded files. If the hash amount of the image does not match the one listed on the official website, the use of such a file is prohibited. A damaged archive may contain errors that will cause the power controller or touchpad to malfunction after the update.
Resetting BIOS settings and entering firmware mode
The first step before installing a new version of the microcode is often to reset the current CMOS settings. This eliminates the impact of old configurations that may conflict with the new software. On Xiaomi laptops, the BIOS is usually logged in by repeatedly pressing the F2 key immediately after power is turned on.
Inside the UEFI interface, you need to find the partition that is responsible for security or boot. Often the required option is hidden. To activate it, you may need to press a certain key combination or enter a special code if you are talking about an engineering menu. Be careful: changing the wrong parameters can block the bootloader.
⚠️ Note: Some RedmiBook models block firmware entry if the supervisor password is set. If you don't know the password, it's almost impossible to reset it software without disassembling the laptop and soldering the chip.
If the standard input doesn't work, you can try the hotkey method. Press the F2 key (or F12 for the boot menu) before the charger is connected, then, without releasing the button, plug in the power, which will force the diagnosis or the device selection menu to start.
What to do if the laptop does not respond to the keys?
Finding and Choosing the Right Version of the Firmware
Finding the right file is the most important step. Official firmware for Xiaomi laptops is often distributed through the built-in updater or available on the global support site. However, for older or Chinese versions (CN Version), files have to be searched on specialized forums.
It is important to distinguish between the Global and China versions. Installing Chinese firmware on a global laptop (and vice versa) can cause the keyboard to malfunction (no Cyrillic or Latin characters) and Wi-Fi modules. Always check Part Number on the bottom sticker.
Below is a table of correspondence of popular models and types of firmware used:
| Laptop model | Type BIOS | Region of version | Status of support |
|---|---|---|---|
| Mi Notebook Air 13.3 | InsydeH2O | Global / CN | Official. |
| RedmiBook 14 | American Megatrends | Global | Official. |
| Mi Gaming Laptop | InsydeH2O | CN / RU | Limited. |
| RedmiBook Pro 15 | American Megatrends | Global | Active. |
When downloading, pay attention to the release date. A newer version doesn't always mean better stability. Sometimes manufacturers release raw builds that fix one problem but create two new ones. Read user comments before downloading.
The BIOS firmware process through Windows
The most common method of updating is to run an executable file directly from the operating system. After downloading the downloaded archive, extract its contents to the root folder of the disk, for example, C:\BIOS_Update. Use of paths with Cyrillic or gaps is unacceptable.
Close all background applications, antiviruses, and sync services, and they can block access to the system interrupts needed to write to the chip, and run the file on behalf of the administrator by right-clicking and selecting the appropriate item in the menu.
When you upgrade, the screen may go out and the fans may change the speed of rotation, which is normal behavior, indicating that you have flashed different parts of the memory. Do not try to close the lid of the laptop, as this can activate sleep mode and interrupt the process.
💡
Tip: Before you start the firmware, turn off the Internet. This will prevent Windows Update from automatically downloading and installing drivers in the background, which can cause a resource conflict.
Once the procedure is complete, the system will automatically restart, and the first run can take up to 2-3 minutes to complete, while the new equipment is initialized and the ACPI settings are adjusted.
Alternative methods: USB Flash and engineering mode
If the system is not loaded, the firmware method with USB-The firmware file (often with the.rom or.fd extension) is renamed according to the instructions for your model (e.g. BIOS.cap or.fd). XIAOMI.ROM) and puts it in the root of the flash drive.
To start the process, you need to log into a special recovery menu. On Xiaomi laptops, this is often done by clamping the combination of Fn + R or Volume Up + Power when you connect the charger. The power indicator can start flashing like a flash, signaling that the data is read.
⚠️ Note: Firmware method with USB It doesn't work on all models. In some cases, you need to pre-modify the boot sector of the flash drive or use specific software to create a boot environment. DOS.
There is also a way through the Intel ME (Management Engine) interface, but it requires deep knowledge and the availability of special equipment (CH341A programmer) to solder the chip if software access is lost.
💡
If the laptop went into a cyclical reboot after a failed firmware, the only chance is to use an external programmer and connect to the SPI contact pads on the motherboard.
Installation of the operating system after flashing
After a successful BIOS update, a clean Windows installation is often required, especially if the microcode version or partition structure has changed.The old system may not work well. Create a bootable flash drive with a Windows 10 or 11 image using the Media Creation Tool utility.
When installing, it is important to properly mark the disk. Remove all old partitions to avoid conflicts with the GPT table. Xiaomi laptops require UEFI mode and deactivated Legacy/CSM for the correct operation of the touchpad and power management.
After installing the OS, be sure to install all drivers from the official website. Pay special attention to the drivers of the chipset, power management and touchpad. Without them, the laptop can quickly discharge or incorrectly respond to presses.