Ooof. I hope it finishes for you. It should reboot after it is done by itself. I hope it comes back up one way or the other. Firmware probably wouldn't fix a boot failure that happens out of the blue that clearing the CMOS wouldn't fix. The good news is that the board has a recovery firmware image normally (Q-LED code F0 through F4 for the BIOS attempting to use the recovery image). The LED you are talking is the Flashback LED (in between the Flashback button and the USB port) or the Q-LED (which displays the code and is located below the bottom most long PCIE x16 slot)? What I hope is happening is that you didn't unzip the firmware on the USB and it hasn't actually started flashing the BIOS. What you are supposed to do is unzip the file and either run the BIOSRenamer.exe file OR manually rename the .cap file to SX570EG.CAP on your USB stick. You then put your USB stick into the Flashback USB port (the very bottom one) and then press and hold the Flashback button for 3 seconds. Once the LED flashes 3 times and then starts flashing the BIOS. If you didn't rename the file, then I'd probably power it off since it has been roughly an hour, rename the file, clear the CMOS which will reset BIOS settings to the defaults and try to flash again. Though flashing the CMOS is optional and isn't always required, I definitely recommend it. You can clear the CMOS by completely powering down the PC, unplugging it and waiting about 10 seconds. All of the LED's should be off at this point and capacitors discharge. Now locate the CLRTC jumper pins (should be just 2 pins) located to the right of the bottom long PCIE x16 slot, left of the SATA connectors, Below the M.2 slot and above the RGB_HEAD2 pins. Apparently ASUS didn't make this a 3 pin with a jumper just sitting there for you to use, so you'll have to use something like a screw driver and lightly touch it between both pins at the same time (no pressure needed, it just needs to touch both) for a second. Now remove the screw driver and plug the cord back in try to do the Flashback process again. There is a CMOS battery, after powering down, that you can pop out to do the same thing but I wouldn't recommend it since the cradles can sometimes break easily when trying to get the battery out and the only way to fix that is to re-solder it back into place. Plus it is between the top two PCIE x16 slots and probably inconveniently under your GPU. IF your BIOS flashes and comes back up, it may still fail to boot due to the original problem. If that happens, find your Q-LED display (not the Flashback LED) and check the Q-Code table in the appendix of your motherboard manual to figure out why it is failing POST. Hopefully it is just 50 up to 55 and you just need to reseat your RAM sticks. You can also follow the POST process as it does its different test by watching the codes progress. If it was E8 thru EB, then the CMOS reset should have fixed that anyway. Good luck! Answer from Deleted User on reddit.com
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HP Support Community
h30434.www3.hp.com › t5 › Notebook-Operating-System-and-Recovery › My-bios-update-is-taking-4-hours › td-p › 9070713
My bios update is taking 4 hours - HP Support Community - 9070713
May 16, 2024 - If your BIOS update is taking an unusually long time (like 4 hours), it may indicate a problem. Here's what you can do: ... Make sure your laptop is connected to a reliable power source. Do not unplug it during the update process.
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Reddit
reddit.com › r/buildapc › how long does bios update take?
r/buildapc on Reddit: How long does BIOS update take?
January 19, 2022 -

I have Asus X-570 E-Gaming. The mobo was showing green Q-LED today, I came to know it's because of failed boot. So, I'm updating the BIOS(firmware or host boot software). The size of the flash file is 32 MiB and the flash drive used is 2.0 one. It's been 22 min now and the green LED(which indicates the BIOS is being flashed) still hasn't gone off, and now I'm worried. What to do?

For reference:

Asus X570 E-Gaming, GSkill RipJaws 32 GiB DDR4 @ 3200MHz, Ryzen 5 3600, Samsung 980 Pro PCIe4 SSD, DeepCool 850W PSU, Zotac RTX 3090 Trinity

Top answer
1 of 10
36
Ooof. I hope it finishes for you. It should reboot after it is done by itself. I hope it comes back up one way or the other. Firmware probably wouldn't fix a boot failure that happens out of the blue that clearing the CMOS wouldn't fix. The good news is that the board has a recovery firmware image normally (Q-LED code F0 through F4 for the BIOS attempting to use the recovery image). The LED you are talking is the Flashback LED (in between the Flashback button and the USB port) or the Q-LED (which displays the code and is located below the bottom most long PCIE x16 slot)? What I hope is happening is that you didn't unzip the firmware on the USB and it hasn't actually started flashing the BIOS. What you are supposed to do is unzip the file and either run the BIOSRenamer.exe file OR manually rename the .cap file to SX570EG.CAP on your USB stick. You then put your USB stick into the Flashback USB port (the very bottom one) and then press and hold the Flashback button for 3 seconds. Once the LED flashes 3 times and then starts flashing the BIOS. If you didn't rename the file, then I'd probably power it off since it has been roughly an hour, rename the file, clear the CMOS which will reset BIOS settings to the defaults and try to flash again. Though flashing the CMOS is optional and isn't always required, I definitely recommend it. You can clear the CMOS by completely powering down the PC, unplugging it and waiting about 10 seconds. All of the LED's should be off at this point and capacitors discharge. Now locate the CLRTC jumper pins (should be just 2 pins) located to the right of the bottom long PCIE x16 slot, left of the SATA connectors, Below the M.2 slot and above the RGB_HEAD2 pins. Apparently ASUS didn't make this a 3 pin with a jumper just sitting there for you to use, so you'll have to use something like a screw driver and lightly touch it between both pins at the same time (no pressure needed, it just needs to touch both) for a second. Now remove the screw driver and plug the cord back in try to do the Flashback process again. There is a CMOS battery, after powering down, that you can pop out to do the same thing but I wouldn't recommend it since the cradles can sometimes break easily when trying to get the battery out and the only way to fix that is to re-solder it back into place. Plus it is between the top two PCIE x16 slots and probably inconveniently under your GPU. IF your BIOS flashes and comes back up, it may still fail to boot due to the original problem. If that happens, find your Q-LED display (not the Flashback LED) and check the Q-Code table in the appendix of your motherboard manual to figure out why it is failing POST. Hopefully it is just 50 up to 55 and you just need to reseat your RAM sticks. You can also follow the POST process as it does its different test by watching the codes progress. If it was E8 thru EB, then the CMOS reset should have fixed that anyway. Good luck!
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11
3-5 minutes in my experience. I've also had a BIOS flash seem like it was taking way too long. And it wasn't going to finish. It wouldn't boot. So I did clear CMOS and retried the flash. It worked the 2nd time. Gigabyte B550 Aorus Pro for reference.
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Reddit
reddit.com › r/buildapc › bios update taking far too long?
r/buildapc on Reddit: BIOS update taking far too long?
October 10, 2022 -

I’ve got the new Gigabyte X670 Aorus Elite motherboard. The BIOS version was F4, and I am updating to F5.

I downloaded the BIOS file, plugged in the thumb drive and copied it over, then I started the update in the actual BIOS itself about 30 minutes ago. The screen went dark after a minute or so and the PC has just been sitting and idling since then. The fans are all spinning and the RGB is on but nothing else is happening. I don’t think it’s reset itself or anything.

I should probably add that prior to this, the PC wouldn’t wake up from sleep mode. When I’d try to wake it up, it would do this exact same thing. Fans spinning, but no actual boot. I’d have to hard reset it to get it to boot.

What should I do? I know you’re not supposed to interrupt a BIOS update, but part of me thinks the update is complete and for some reason its having an issue resetting back into Windows. Should I give it a shot or wait?

EDIT: Solved! So I went ahead and did a hard reset. The bios never updated. After some troubleshooting, I found out that the XMP/EXPO profile was to blame. I guess the system doesn’t like it. After disabling it, I was able to update the bios no problem, and the computer now wakes from sleep with no issues.

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Dell
dell.com › dell community › desktops › inspiron desktops
BIOS Update Running Over 2 Hours | DELL Technologies
May 12, 2021 - IMO, it's safer to update BIOS without using SupportAssist... ... After about 4 hours, a window popped up saying to close all other programs (had them closed for 4 hours). Closed the other programs and then asked if I wanted to flash the BIOS.
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Reddit
reddit.com › r/computers › how long should my bios take to update? it’s been like 10+ minutes now. b550 aorus pro ac motherboard.
r/computers on Reddit: How long should my bios take to update? It’s been like 10+ minutes now. B550 aorus pro ac motherboard.
November 16, 2022 - Jeez, it shouldnt take more than 5 minutes. Was it doing it online? ... I had a usb with the bios update on, I just left it on for 5 hours and risked turning it off, luckily it worked though
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Linus Tech Tips
linustechtips.com › the workbench › troubleshooting
How long for a BIOS update? - Troubleshooting - Linus Tech Tips
January 15, 2020 - Hey all, I'm gonna a build a PC real soon for the first time and I was researching about the motherboards and the like. I got to a point where I was getting educated on BIOS updates and it eventually led me to some posts of people have their bios updates get stuck at the update install screen. Wh...
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Tom's Hardware Forum
forums.tomshardware.com › home › motherboards
Question - Flash BIOS Update taking forever | Tom's Hardware Forum
March 4, 2023 - Ok so I was building my new PC ... correct BIOS version I needed to run my CPU. I waited around 5 minutes which I heard was how long it would usually take until I flipped the switch on my power supply and repeated this process again until I decided to disconnect all of the other components from the motherboard except for the power supply and tried flashing it again. It has been 2 and a half hours since then ...
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Super User
superuser.com › questions › 1699672 › how-long-can-bios-update-take
firmware - How long can BIOS update take? - Super User
January 17, 2022 - It's an hour since you asked, and that's definitely too long for a normal BIOS update. So, what to do: I would take a chat with Asus support
Find elsewhere
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Tom's Hardware Forum
forums.tomshardware.com › home › systems
[SOLVED] - How long does BIOS update take | Tom's Hardware Forum
January 17, 2022 - Bios updates usually take only about 1-3 minutes, then 2 or 3 reboots and its done.
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Quora
quora.com › Why-does-a-BIOS-update-takes-so-much-time-when-its-a-4-MB-file
Why does a BIOS update takes so much time when it's a 4 MB file? - Quora
Answer (1 of 4): Flash updates are usually conducted over the primitive Serial Peripheral Interface Bus, which is a relatively slow serial interface which individually erases and reprograms the flash in blocks. It is relatively easy to build a small, self-contained updater to use that path. It's...
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DoItYourself.com
doityourself.com › doityourself.com community forums › electrical, ac & dc. electronic equipment and computers › computers, internet capable devices and peripherals › dell bios update taking waaaaay too long?
Dell BIOS Update taking Waaaaay too long? - DoItYourself.com Community Forums
March 19, 2019 - It shows the correct Service Tag number, notes that the Dell Update has never been performed since new, and shows (2) Available Updates, one is optional, the other "Critical BIOS". I clicked the BIOS to start it, last week, but after 3 hours of waiting, got impatient, and cancelled it.
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Tom's Hardware
tomshardware.com › pc components › motherboards
24-hour BIOS update? User's attempt to flash motherboard becomes a marathon | Tom's Hardware
March 13, 2025 - At the time of writing, they left ... We do not know the reason why the BIOS update is taking so long, as the process usually takes a few minutes at most....
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HP Support Community
h30434.www3.hp.com › t5 › Desktop-Operating-Systems-and-Recovery › BIOS-update-taking-to-long › td-p › 7377226
Solved: BIOS update taking to long - HP Support Community - 7377226
August 21, 2024 - My computer just out of nowhere stopped coming on. The laptop had power and was turning out but the screen stayed black. After messing with it for hours we started a BIOS update that the laptop never told me it needed. Now we are two hours in waiting on the laptop to finish up dating and it ...
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Reddit
reddit.com › r/alienware › bios update taking forever. i want to sleep but i'm stressing
r/Alienware on Reddit: BIOS Update taking forever. I want to sleep but I'm stressing
December 10, 2020 -

I'm on an Alienware Aurora R11. I tried updating my BIOS as I do, with Alienware Update this time. It's either that or Support Assist. I've never ran into problems before and I didn't know until today that people have bricked their motherboards by doing this. I'm really scared because I just dropped 1900 on this computer a few days ago and I absolutely can't afford to repair it, let alone replace it. Currently, the Alienware Update window says:
Installing Updates (3 of 3)
Warning: The current operation can no longer be cancelled.
(The warning you normally get about not unplugging anything or whatever. you know)
I have automatically restart system when required checked. It has not turned off even once.
Cancel is partially faded out and I can't click on it.
The more I look into this, the more stressed I get. I need sleep but I'm so tense and shaking, I feel like everything I've just invested in could collapse.
I don't know if I said this already or if it was clear, but the update is still going on. I'm writing this from the same computer that is being updated. I need to get this post out so I'm not making any edits at the moment. Sorry.

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Lenovo Community
forums.lenovo.com › t5 › Lenovo-IdeaPad-1xx-3xx-5xx-7xx-Edge-LaVie-Z-Flex-Laptops › How-long-it-takes-lastest-bios-update › m-p › 5264144
How-long-it-takes-lastest-bios-update - English Community - LENOVO COMMUNITY
I faced a similar issue today. I have the laptop being updated for 6 hours now and no activity. It is just stuck on the 'lenovo' screen. Pathetic ! ... I'm sorry to hear about the issue you're facing with the BIOS update. It's not normal for the update to take this long.
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Reddit
reddit.com › r/techsupport › how long should a bios update take?
r/techsupport on Reddit: How long should a Bios Update take?
July 21, 2019 -

Hello.

I started a bios update earlier today (11ish pacific) and it was running fine until now. It's been stuck at 52% for about a half hour now. I have no control of m&k. It does not appear to be frozen because the CPU fan rpm is still changing.

Some notes:

  • CPU: AMD - Ryzen 7 2700 3.2 GHz 8-Core Processor

  • Mobo: MSI - B450 GAMING PRO CARBON AC ATX AM4 Motherboard

  • bios update: E7B85AMS.17M

Any other questions please ask. Thanks!