How to Reinstall BIOS on a Computer

Changing BIOS settings on a PC may be required during the installation of Windows. After replacing the components of the system unit, due to battery replacement, when all settings are reset to default values, etc. Understanding the purpose of sections and menu items, you can carry out the procedure yourself, without involving a specialist. Let’s figure out how to configure BIOS on a computer.

BIOS varieties

On computers used several types of BIOS, which differ in appearance and in the arrangement of menu items. In this case, the settings will be identical or very similar. On older computers, AWARD or AMI BIOS is used, on modern motherboards. UEFI. Last one is logical continuation of the development of the basic input-output system, It features a graphical interface, mouse support, the ability to select a language, a wider range of settings.

Despite all the advantages of UEFI, users do not often update their hardware, so AWARD or AMI is still installed on most computers currently in use. Using the latter as an example, we will consider the setting.

How to enter BIOS

To enter the BIOS, you must restart the computer. On one of the first screens will appear a screensaver of the motherboard, on which the keys will be indicated, allowing you to enter the system we need. Usually required press Del or F2, although there may be other variations. The surest way is to watch the information displayed on the monitor during PC startup.

In the same way, you can find out the key used to open the window in which priority trigger device. Changing the parameter is required when installing Windows from a USB flash drive or disk.

Main Section

BIOS setup on the computer starts with the Main section, which the system opens by default. It will work out set the date and time, set the parameters of the hard disk and view information about the system.

Having selected one of the presented disks, by pressing the Enter key, the user will see the following settings options:

  • LBA Large Mode. The parameter is more relevant to older computers, since it enabled support for drives larger than 512 MB.
  • Block. Allows you to deactivate the transfer of information across several sectors simultaneously. It should be left in the “Auto” position, otherwise the speed of the hard drive will drop sharply.

In point “System Information” Provides information about the BIOS version and the date the firmware was created, the processor (speed, number of cores), RAM (installed and available).

Some users on the “Main” tab find the parameter in BIOS Quiet Boot. What this setting is, not everyone knows. Literally, the name of the option translates as “silent boot”, and implies the launch of the OS without displaying messages about testing equipment. Instead of information from the POST procedure, the screen saver of the motherboard or the logo of the computer will be displayed.

Going to the “Storage Configuration”, you can meet the following settings:

  • SATA Configuration. Responsible for the SATA controller soldered into the motherboard. It can be disabled (Disable), transferred to Compatible mode, for working with older Windows OS (98, 95 and earlier) or in Enhanced mode, for working with modern versions of operating systems.
  • Configure SATA as. It is recommended to choose AHCI for the use of modern technologies (for example, Plug-in-Play).
  • Hard Disk Write Protect. Write protection of disks. The parameter should be turned off if it is supposed to add information to the media.
  • SATA Detect Time out. The time taken by the system to search for connected components. With a decrease in the indicator, it will be possible to accelerate the launch of the OS, but there will be a risk of not identifying one of the drives.

Advanced Section

Visiting item “JumperFree Configuration”, You can set the clock frequency of the memory, the voltage of the chipset, the frequency of the memory bus. Setting these BIOS options on the computer should be considered in a separate topic. Make changes very carefully so as not to damage the equipment.

The item of greatest interest to the user is “USB Configuration”, in which you need activate all USB ports and set the maximum data transfer speed (High Speed). All other parameters must be left in the “Auto” position.

Power Section

Here you can configure the power of the computer. The following values ​​should be set:

  • Suspend Mode. To the “Auto” position;
  • ACPI APIC. Enable the option (Enabled);
  • ACPI 2.0. Disable the mode (set to Disabled);
  • APM Configuration. Leave all the default settings;
  • Hardware Monitor. Assembled in the subsection information about the temperature of the processor, the speed of rotation of the cooler and the voltage that the power supply produces. You can activate the item “CPU Q-fan Control” for intelligent control of the speed of the cooler.

Boot Section

On this tab, the computer boot settings are changed. In the subsection “Boot Device Priority” is set drive boot sequence. Sometimes the sequence has to be changed during the installation of Windows, when it is not possible to select a boot disk through a special window when starting the PC. In other cases, the parameters can not be touched, or prioritize the disk on which the operating system is located.

“Hard Disk Drivers”. In the subsection, select the drive from which you should first try to boot the OS. Configurable if There are several drives in the system unit.

Video: How to Reinstall BIOS on a Computer


The subsection “Boot Setting Configuration” contains the following settings:

  • Quick Boot is an option in BIOS that disables hardware tests during computer startup. If the option is activated, the system will boot faster, but the user will not be able to see a description of the errors if they occur.
  • Full Screen Logo. Instead of information about the equipment, a logo will appear on the screen at startup.
  • Add On ROM Display Mode. Parameter defines data display sequence about devices connected via the board having their own BIOS.
  • Bootup Num-Lock. If enabled, then after starting the PC, the Num-Lock key will be in the active position.
  • Wait For “F1” If Error. If an error is detected during initial testing, the user will be required to press the F1 key to start the OS further.
  • Hit “DEL” Message Display. If disabled, then at startup, the screen will not display a message about which button should be pressed to enter the BIOS.

Sometimes in the subsection described above you can find the option “Fast Boot”. This is a parameter in the BIOS, which is similar to “Quick Boot”, which allows you to speed up the loading of the OS.

Security Setting:

  • Supervisor Password. Makes it possible to set a password for entering the BIOS, the entry of which will allow you to change any parameters.
  • User Password. Similarly, only after entering the password will be given the ability to view the settings, but not their change.

Section Tools and Exit

The Tools tab is required to update the BIOS from a floppy disk or flash drive (the “ASUS EZ Flash” item), as well as to view information about the connected cable to the network card (the “AI NET” item).

In the tab “Exit” is made exit settings. The following options are possible:

  • Exit and Save Changes. Exit with saving all the settings;
  • Exit and Discard Changes. Exit without saving changes;
  • Load Setup Defaults. Setting standard values ​​for all parameters;
  • Discard Changes is a BIOS item that allows you to undo changes made during a session.

You can exit the BIOS from any section using the F10 (save and exit) and Esc (exit) keys.

As mentioned above. This is a new version of the well-known BIOS. UEFI is able to work with larger disks, has more settings and is more protected from hacking. The differences are also in a more pleasant graphical interface and support for mouse control.

Externally, the UEFI of manufacturers such as ASUS, MSI, Gigabyte, ASRock will be different. However in most cases parameters are identical, moreover, they repeat the above. It is worth noting an interesting feature that appeared in the new BIOS. This is Network Boot. Her activation forces the system to first attempt to load the operating system from the server, and only if it fails, from the hard drive.

The option is not useful to ordinary users, so it should be turned off. This will allow speed up computer startup and removes the unnecessary procedure at startup.

Network Stack is the same feature in BIOS as the one voiced above, it only has a changed name. Associated with her setting. Network Boot Priority, which allows identify network card, through which the OS will be loaded from a remote PC or server.

The information presented in the article will give an idea of ​​the basic BIOS settings. Most of them It is not recommended to change to avoid problems in the computer. Some parameters will allow you to switch the mode for interaction with modern operating systems and increase the data transfer speed.

How to Reinstall BIOS on a Computer

In certain circumstances, the BIOS needs to be reinstalled for the computer to start up and / or work properly. Most often this needs to be done when methods such as resetting settings no longer help.

Technical features of BIOS flashing

To reinstall, you will need to download the version that is currently installed from the official website of the BIOS developer or the manufacturer of your motherboard. The flashing procedure is similar to the update procedure, only here you will need to remove the current version and install it again.

Step 1: Preparation

At this stage, you need to find out as much information as possible about your system, download the version you need, and prepare your PC for flashing. For this, you can use both third-party software and the capabilities of Windows. Those who do not want to bother too much on this issue are recommended to use third-party software, since in this case, in addition to information about the system and BIOS, you can get a link to the official website of the developer, where you can download the current version.

The preparatory phase will be considered on the example of the AIDA64 program. This software is paid, but has a trial period. There is a Russian version, the program interface is also very friendly to ordinary users. Follow this guide:

  1. Run the program. In the main window or through the left menu, go to “Motherboard”.
  2. Similarly, go to “BIOS”.
  3. In blocks “BIOS Properties” and BIOS Manufacturer You can see the basic information. The name of the developer, the current version and the date of its relevance.

If for some reason you can’t download anything in the 5th paragraph, then most likely this version is no longer supported by the official developer. In this case, use the information from the 4th paragraph.

Now it remains to prepare a flash drive or other medium so that you can install a flashing from it. It is recommended to format it in advance, since extra files can harm the installation, therefore, disable the computer. After formatting, unzip the entire contents of the archive that you downloaded earlier to a USB flash drive. Be sure to check that there is a file with the extension ROM. The file system on the flash drive must be in the format Fat32.

Stage 2: Flashing

Now, without removing the flash drive, you need to proceed directly to flashing the BIOS.

  1. Restart your computer and enter the BIOS.
  2. Now in the menu prioritizing downloads, put the computer boot from a USB flash drive.
  • Save the changes and restart the computer. To do this, you can use either the key F10, either item “Save & Exit ».
  • After the download starts from the media. The computer will ask you what to do with this flash drive, choose from all options “Update BIOS from drive”. It is noteworthy that this option may have different names depending on the characteristics of the computer, but their meaning will be approximately the same.
  • From the drop-down menu, select the version you are interested in (as a rule, there is only one there). Then click Enter and wait for the flashing to complete. The whole procedure takes about 2-3 minutes.

    It is worth remembering that, depending on the BIOS version currently installed on the computer, the process may look slightly different. Sometimes, instead of the selection menu, a DOS terminal opens, where you need to drive the following command:

    Here, instead of the underscore, you need to register the file name on the USB flash drive with the extension Bio. Just for this case, it is recommended to remember the name of the files that you dropped onto the media.

    Also, in rare cases, it is possible to complete the flashing procedure directly from the Windows interface. But since this method is suitable only for certain manufacturers of motherboards and is not particularly reliable, it makes no sense to consider it.

    It is advisable to flash the BIOS only through the DOS interface or the installation media, as this is the safest way. We do not recommend downloading files from unverified sources. This is not safe for your PC.