The BIOS (basic input/output system) of an IBM-compatible PC is a ROM which performs the POST (power-on self-test), initializes the peripheral devices, and provides a basic firmware interface.

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How BIOS shadowing works

I heard that BIOS shadowing works by copying the BIOS program into faster memory and running it from there. Is that correct? BIOS is responsible for certain startup tasks, so after startup, does it ...
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PC power supply & normal range for voltages reported in BIOS hardware monitor?

I'm trying to diagnose whether my computer has an ample power supply. Sometimes when I play a video-intensive game, both monitors lose the video signal, even though the computer remains on and sound ...
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How do I reset/update my BIOS for Optiplex GX280?

So far this has been a nightmare for me, which has been frustrating me constantly. I am using Dell Optiplex GX280 with Windows XP home edition, which is running a BIOS version A04. Recently, i've ...
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217 views

My BIOS is gone

After GRUB replaced my MultiBoot Menu and I couldn't change my Boot Device, I got sick of it and opened nautilus and deleted the /boot folder, and I thought doing that would make it go and let me open ...
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427 views

What does an ACPI BIOS configure during boot?

When a PC boots with an ACPI BIOS, what does it exactly do? I understand that the point of ACPI is to allow the OS to control hardware resources and power management but before the OS is loaded ...
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What does this beep code mean?

When I wanted to start my laptop today (an Acer Aspire 8920G), the laptop started beeping. I know this beeping is a POST error code, but I can not figure out which one it is. The motherboard of the ...
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After being shutdown, why won't my computer start without leaving the power unplugged first?

For the past few months, whenever I shut my computer down fully and leave it off for more than a few minutes, it won't start back up without an elaborate ritual. This is an ordinary shutdown, so the ...
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UEFI vs non-UEFI options in boot menu

I just built new PC based on Asus Z87-Plus motherboard and in BIOS boot menu I now have my removable devices listed twice - once as a device itself and once with "UEFI: " prefix. It looks like this ...
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How to enable Intel VT-x?

I have a CLEVO w150erm, with a i7-3610QM processor, which supports Intel VT-x. However in order to use it I have to activate that option in the BIOS (or so that's what I believe) but I simply can't ...
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LENOVO desktop computer only boot with F12

I have a new desktop computer: a LENOVO model 3493-BFG with Windows 8. I started the computer without any problem. Once Windows was automatically set up, I created a recovery media (an USB ...
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836 views

How can I be sure that the motherboard is dead and it's not another issue?

So I have and old computer with and Intel D101GGC motherboard and a pentium 4 cpu and award bios, with a long repeating beep and not passing POST. I tried: RAM checking, they are good and working ...
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Does the BIOS encrypt the password?

Does the BIOS encrypt the password? If not, can it be found with physical access? If yes, which algorithm does it use?
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BIOS continuously pressing a key internally filling keyboard buffer

I have the strangest problem I have ever faced and I can't figure out what's going on. It started today after a few hours of full shut down. It had occurred once a few weeks ago, but I can't remember ...
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2.1TB limit on BIOS?

While checking out this 3TB 7200RPM drive as a candidate for my hardware RAID array, I saw the product video and at about 1:40 into the video, the guy says that BIOS can't handle more than 2.1TB of ...
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3k views

Laptop BIOS clock resets on reboot?

I have a fairly new Sony Vaio laptop that had some power problems, and they put in a new motherboard yesterday. It fixed my old problems, but now the clock is acting weird. The BIOS clock gets reset ...
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205 views

RAID Hard drive partition from one motherbord to another?

I had ASUS P5K3 Deluxe/WiFi-AP which was working for 4 years. Yesturday it burned out... literaly with smoke and fire... So I plan on getting DFI LanParty LT X48-T3RS (Intel X48, DDR3) as a ...
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Frequent Windows 7 Blue Screens

My computer was all bought in October 09 and assembled by myself. I haven't had any problems until I moved from North Carolina to New York. Now, I've been getting blue screens such as ...
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System Works Fine but only after Very Long BIOS POST Times?

I built this AMD XP64/XP32 system in November 2008. It runs well, but it does not start well. Windows Restarts are fine, but cold starts average 4-5 minutes to POST, with the record-holder so far ...
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Is the motherboard the cause of these errors?

Motherboard is : ASUS A7N8X-E Deluxe, Rev1.01, On start up get: "cmos checksum error - defaults loaded" error BIOS is reset everytime and can't boot to Windows off HDD. POST report is ok once I ...
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Get rid of boot priority changed press f1 to continue message

When I boot up my computer and my phone is charging or something via usb, a message comes up that forces me to press f1 to continue, due to the boot priority changing. I'm on a nforce 750i motherboard ...
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BIOS Recovery for Lenovo Ideapad U410

I'm stuck while trying to recover an corrupted EFI / Insyde BIOS. Right now the laptop is in a state, that when the power button is pushed, the computer turns on and immediately off again. I ...
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Mouse light doesn't turn off when computer is off

I've bought a Coolermaster devastator bundle with my new PC. When i shut down the computer, the light on the mouse never turns off. The keyboard lights are off. Both peripherals are plugged with USB. ...
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288 views

How to flash Dell Precision 390 from linux (debian)

I am trying to update my BIOS: $ sudo dmidecode -s bios-version 2.1.2 With a newer one: 2.6.0. I went to this page Dell Precision System BIOS, 2.6.0 After downloading the file WS390-020600.BIN, ...
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987 views

My PCIe video card does not work in POST, only comes on when Windows loads

I have an ASUS Maximus V Extreme motherboard which has onboard video. There is an Asus GeForce GTX 670 in PCIe slot 1. In the BIOS, I have PCIe selected as the preferred GPU. I've tried disabling ...
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I flashed the BIOS on my ASUS P5Q motherboard and now it won't boot

i recently got round to upgrading from Windows XP to Windows 7 64-bit and when i was installing all the new drivers for Windows 7 i thought i would take the opportunity to update my BIOS as well - big ...
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268 views

Dell Inspiron 14r doesn't boot

I have a Dell Inspiron that doesn't seem to get past the initial POST - it turns on and displays the logo, and the loading bar fills about 60%, but can't boot into the OS, enter Setup (F2), or display ...
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75 views

Is BIOS used after OS fully loaded?

Obviously, I can't get to the BIOS after the OS is loaded. But is it somehow possible to invoke BIOS functionality/interact with it from within the OS? Does the OS do it? Is it possible for a user ...
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Windows 7 SP1 installation hangs during boot when CF card present in sata card reader

as per subject I have a nasty problem with Windows 7 and a CF card in a SATA card reader, first some details. Hardware specifications: Asus P8C WS (Intel C216 chipset) with BIOS version 3202 ...
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How to get past Thinkpad T530 PXE prompt to BIOS setup?

How do I get to the Thinkpad T530 BIOS setup? As the laptop turns on I press ENTER when prompted, then press F1 when prompted, but that takes me to the Intel PXE prompt. If I hit CTRL-S I get into the ...
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Do PCI / PCIe buses and devices always enumerate in the same order?

I am looking into a situation where there are multiple, identical (National Instruments) PCIe DAQ modules in a PCI/PCIe chassis, connected via either a single or dual chassis controller. In the worst ...
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How to install Windows with no CD drive boot option in BIOS?

I have a new computer which I built from scratch and I am trying to install a copy of Windows Vista on it. I am able to get to the BIOS and change the boot options which are as follows.. -Built-in ...
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218 views

Very random BSODs and BIOS hangs

I get BSODs after the computer runs for anywhere from a minute to a couple of hours. I have had the problem for some days now, and it has become progressively worse. Sometimes, it hangs on the boot ...
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943 views

Is there a way to make my Windows know about my BIOS settings?

For a very specific situation on a project, I need to make a Windows machine know about some specific settings at the BIOS(such as Enabled/Disabled PXE boot, Boot Sequence, Bios Version, and ...
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BIOS without Keyboard

My server is in another city and sometimes loses power. It is headless and I only use it via SSH/FTP. I have found a way to turn it back on after the power returns, but I need to press F1 or F2 with ...
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134 views

Can I trust this weird BIOS Message ending in 'thanks'?

So I started up my laptop today and was greeted with the following message (not a direct quote): The type of the AC adapter cannot be determined. This may interfere with your computer's performance. ...
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Limiting RAM and CPU cores

I want to limit the number of CPU cores and RAM which the OS sees. Is there any way of doing this in BIOS ? I tried changing the grub file with maxcpu parameter. Is there something which I can do in ...
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Why is my computer 'freezing' during OS loading & POST?

My computer is suffering from seemingly random crashes, that get progressively worse the longer a computer session runs. Initially, the system will start, appear to run fine for some time, then a ...
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Is it normal for a SATA drive to show 0MB size in BIOS?

Right, so this is the first time I've attempted to build a computer that will use a SATA disk. Disk Details are as follows Seagate 7200.12 ST3500413AS PartNo. 9YP142-303 Firmware JC45 Date Code ...
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131 views

Reinstall Windows 7 Ultimate?

I have a computer with Windows 7 Ultimate on it that I may need to reinstall. I set it up a few months ago and had problems which ended up being related to a bad IDE cable (yes, I know, old tech but I ...
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784 views

Can BIOS be eventually upgraded to EFI?

I have an Intel PM55 chipset in my notebook. Reportedly Windows 8 (aka Windows Next) will not support BIOS-based systems. Is my motherboard forward-compatible to house an EFI firmware?
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hard drive recognized by bios but not by windows

I'm adding a new hard drive (A seagate ST31000340NS; I had links in here but I don't have enough reputation to post them. Interestingly, the bios recognizes it as a ST31000340AS, but it was bought as ...
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4answers
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How do I enable the on-board graphics card?

This information is based on an ACER Aspire M1641. I have a Nvidia NForce 620 chipset with a GeForce 7050 on-board GPU. I have added a second Nvidia GeForce 6200SE TC PCIe GPU, which automatically ...
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3answers
57 views

Unable to access my BIOS although the OS boots fine

I have an MSI GT602OC Laptop upon which I'm using an Ubuntu 15.04 (only OS). I can access my OS, it boots fine, no problems here. But when I try to access the BIOS (through the DEL key that I used ...
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3answers
77 views

What is the name of the screen that appears when the computer starts?

When our PC starts the company logo appears such as “SONY,” “DELL” etc… Just like the boot loaders, BIOS menu does this screen have a name?
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Can´t access BIOS to change boot device

The monitor of my HP Pavilion is damaged. I have been using an external monitor to work. Now I need to change the boot device order. However, the external monitor does not display the BIOS menu, ...
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Why don't computers start loading the OS earlier in the boot process?

I was reading an article referred to me from another thread on the Windows OS boot process, and while reading, I couldn't help but wonder -- When a computer turns on, why can't it start loading the ...
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“Boot from CD” waits for ever?

THE PAST I have a Windows 2003 system that for a long time has had a CD drive with a non-bootable CD stuck in it (it's really stuck - the paperclip trick does not work) The boot sequence included ...
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3k views

How to check if laptop supports mSATA?

I have Dell inspiron 7520 laptop which has two configurations with mSATA connection and preinstalled mSATA card and without mSATA connection. Mine is without preinstalled mSATA card, but I found in ...
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582 views

How can I tell if a 2TB drive is too much for my bios?

2Tb Drive, several years old Pentium 4 HP dc7100 machine with v 1.05 of the C786C1 Bios. There is an 80GB SATA drive connected already, which is recognized, the 2TB drive comes up as 0 Mb in the setup ...
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PCI Expansion card resource allocation by a Plug-and-Play BIOS

Plug-and-Play BIOS spec says that if you have a PnP BIOS, it can configure the hardware. This means that your BIOS reads the resource requirements of all devices and configures them (allocates ...