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How to enter the bios? And a little about BIOS

Let us consider in more detail what happens when the desktop (stationary) computer is turned on and how to get into the BIOS Setup itself.

Boot order
First of all, it turns out whether the processor and RAM modules are installed in the motherboard. Next, the video card is initialized and checked. Information on its type, the amount of installed video memory, and possibly some other parameters that are inherent in your PC appear on the monitor screen.

Due to the inertia of modern digital monitors, it is often impossible to see this picture: it disappears faster than the monitor manages to complete the switch to the mode you need. And some video adapters do not display any messages at all during their initialization. Plus, some BIOS versions allow you to disable the display of any messages when the system boots – instead, the manufacturer’s logo is displayed.

After the video card is initialized, the processor type is determined, the amount of installed RAM is checked, these devices are tested (you can see an example in Fig. 1). The hard drives and other IDE / SATA devices are initialized and checked (Fig. 2), then expansion cards (boards) are initialized and checked.

Fig. 1. Determining the type of processor and testing RAM at boot

Fig. 2. Clarification of the configuration of IDE / SATA devices

After checking all the devices, the Plug and Play extension starts, finding devices that are compatible with the Plug and Play standard.

If the expansion card has its own BIOS (for example, a RAID controller card), control is temporarily transferred to the BIOS of the card – it can also display its messages.

At the end of testing, some BIOS versions display a table with the hardware configuration of the PC (Fig. 3), after which control is transferred to the operating system (OS), more precisely, to the bootloader of the operating system. This bootloader is usually located in the boot sector (boot sector) of the hard drive.

Fig. 3. Summary table with the configuration of all the hardware components of your computer

BIOS Setup Call
At the time of initial initialization, after the self-test procedure, in most cases an inscription appears on the screen inviting you to enter the BIOS Setup. For example, it may look like this: Press DEL to enter SETUP (see Fig. 1, Fig. 2). Well, to enter the BIOS Setup, follow this recommendation, while the inscription is on, press the key on the keyboard.

On different computers, BIOS Setup can be called in different ways: it can be (found in individual Phoenix BIOS implementations), (on Intel motherboards and in some versions of Phoenix BIOS), (another option for Phoenix BIOS),, combination ++, ++, + or any other key (keyboard shortcut). Just the most common option. Usually, the way to enter the BIOS Setup is indicated at boot, it can be found in the manual for the motherboard or the computer.

But even if the invitation is not displayed, instead of messages at boot, the manufacturer’s logo is displayed, hiding all messages, this fact does not interfere with the BIOS Setup call. As soon as the keyboard is initialized (Num Lock, Caps Lock, Scroll Lock indicators flash), press the key several times in a row. Does not help? Reboot your pc and try the next option from the above.

For complete confidence, the key (key combination) should be pressed 10-15 times within about 10 seconds. This ensures that the click is not “lost”, but will be worked out. Often, the initialization of an entry in the BIOS Setup is accompanied by the appearance of an inscription on the monitor: say, this may be an Entering SETUP message.

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