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This Asus laptop is a 2-in-1 touchscreen laptop. It can be identified by its model number: Q504UA-BHI5T13.

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Secure boot violation, none of my googled solutions seem to be workin

So this was the closest I could find to my model, but mine’s actually Q504UA-BI5T26 looks identical though. Bios screen is different than alot of the similar ones i saw with asus while searching for answers.

So I got home, checking the $@$* out and figure maybe updating the bios will help? Nope, because the ezflash bios tool has none of the features shown on the asus website, it just lets me look around the windows recovery drive in which i can't load anything because none of its UEFI bootable. And the kicker is that the Asus website has garbage support for this model apparently, with a bios version listed for download as version 302, while the one on my laptop is 304.

Laptop is an asus Q504UA model, (also, strangely unable to find it while searching through the asus laptops, but somehow it came up on the driver search page. I have to post links to the gdrive images because the forum won't allow me to link images directly it would seem.

Here's where it starts.


And this is what the front of my bios looks like (a bit different from the asus bios screens i see smattered all over the web. 


I then head into the advanced tab


The advanced portion of the advanced tab (seems redundant), the washed out one i have highlighted is just intel virtualization technology.


The ezflash utility options is basically just something to access a connected device with, it doesn't contain the more sophisticated internet update option that i saw shown in other tutorials with what i can only guess are newer or better versions of my bios.


Boot options (washed out one is Fast boot, enabled by default)


Security options (washed out portion is Administrator password)


Secure boot section (washed out section is just to move back / up a level in the options)


If I follow the basic internet fixes for the initial problem that presents itself, I wind up here. Those steps are > Disable Secure boot, Disable Fast boot, Enable CSM etc. 


And my bios screen has this new drive listed (which isn't really a new drive, it just isn't going into the windows boot manager anymore.)


Now, if I boot from a usb thumb drive with windows I am able to get into windows 10 install process to fool around with some extra tools, but startup repair didn't really seem to do anything, and recovery doesn't work. But if I list the partitions in the command prompt from the windows install troubleshooting menu, it shows me everything as being healthy.


Now I also thought maybe uninstalling the latest windows update could do something, but alas, when I try that it says I have pending updates and to use startup repair instead, which goes to restart > diagnosing problems > attempting fix (for about 1 second) and immediately back into the windows troubleshooting screen, wherein if I go back and reset my bios to default from here i find myself in the secure boot violation again.

So again, I try something else. Going back to try and booting from the thumb drive after resetting my bios options and something new comes up in the windows repair / troubleshooting settings. 


Before with secure boot disabled, the UEFI firmware settings option didn't showup, and clicking it tells me i need to restart my computer to do it. So I do, and it sends me strait into the bios which isn't too surprising. But I still don't see anything about UEFI settings anywhere, or making sure something boots as such. The only thing that shows up as UEFI in my bios now is the flash drive i have for installing windows. Boot option 1 is still the windows boot manager, while 2 is the flash drive, so the boot manager just doesn't seem to be kicking in. 

If I remove the flash drive and reboot at this point, I just go back into the Secure boot violation screen, if I leave it in, it of course loads the windows 10 install startup. 

I'm at a complete loss as to what could be going on, I'm used to dealing with desktops and I've never had this kind of issue with one.

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Have you tried installing windows then after it’s finished doing the windows 10 install (welcome setup account screen) turn laptop off and on again with the windows 10 install drive remove and see if the secure boot violation screen appears as it shouldn’t.

Is the flash drive configured to boot as UEFI or Legacy? It’ll need to be set to UEFI. Use media creation tool to download a windows 10 iso if needed then use RUFUs to burn that iso as a standard windows installation that has GPT / UEFI selected.

You can download RUFUs here:


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The flash drive shows up as UEFI from the bios, I set it up using the windows 10 boot tool from microsoft, so that actually starts up fine. Problem with reinstalling windows right now is two fold, the first reason being that I don't have a key with this laptop because there's a separate partition on the hd for "resetting" or whatever, whose function I can't seem to access.

The second reason I haven't formatted yet is because I need to backup the data. I didn't have the right screwdriver which just came in the mail today, so i'm gonna back it up using my primary pc which will open up more options for fixing it, but this crap just seemed to randomly pop up because I know my wife didn't go and mess with the bios settings, she doesn't even know what a bios is or how to access it.

Edit : and of course the T5 tip from the ratchet set i got wound up being junk, and stripped itself with almost no effort, not even loosening the first screw, time to find a better one.


Might be time to make a windows portable USB you can do so with the software here:


That way you can choose to boot windows 10 via a flash drive or portable drive. It's great for doing backups and checking hard drive health without opening the laptop.


Interesting, I'll try that and get back with the results later. Thanks Ben.


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