Hi Team,

I put more efforts on this and fixed issue at my end itself.

If you see rufus download page "https://rufus.ie/en/";. here a bug has been 
fixed in Rufus version 4.2, below are fixed issues/enhancements in 4.2 
version of Rufus (*highlighted one* was the issue with me as I was using 
Rufus 3.x version):-

- *Version 4.2* (2023.07.26)
   
   - Add detection and warning for UEFI revoked bootloaders (including ones 
   revoked through SkuSiPolicy.p7b)
   - Add ZIP64 support, to extract .zip images that are larger than 4 GB
   - Add saving and restoring current drive to/from compressed VHDX image
   - Add saving and restoring current drive to/from compressed FFU (Full 
   Flash Update 
   
<https://learn.microsoft.com/en-us/windows-hardware/manufacture/desktop/deploy-windows-using-full-flash-update--ffu>)
 
   image *[EXPERIMENTAL]*
   - Fix a crash when trying to open Windows ISOs, with the MinGW compiled 
   x86 32-bit version
   - *Fix an issue where ISOs that contain a boot image with an 'EFI' label 
   are not detected as bootable*
   - Increase the ISO → ESP limit for Debian 12 netinst images
   - Ensure that the main partition size is aligned to the cluster size

so now I have installed Qube OS 4.2.0 RC4 successfully on my machine.

in nut shell, following steps helped me to get fix of this issue:-

1. Using latest version of Rufus (4.2 or above)
2. Updating BIOS to its latest version
3. Verification and usage of corrected Qube OS ISO file

>From my end, this mail trail can be considered *closed* now.

Thanks and Regards
Rahul
On Monday, 16 October 2023 at 20:28:11 UTC+5:30 Rahul Jain wrote:

> Thank you Tobias and other folks and really sorry for delayed reply on 
> this.
>
> This is what I did:-
>
> 1. Updated motherboard BIOS version to latest one.
> 2. Verified ISO file should be same as downloaded one, it was corrupted so 
> corrected later.
>
> By doing so, I was able to see Qubes 4.2.0 RC4 installation UI, but was 
> not able to resolve issue of Installation source, so I decided to use Rufus 
> made USB installation media, for this, when I tried to make USB 
> installation media for "Qubes-R4.2.0-rc4-x86_64.iso" by rufus, *I was 
> seeing only UEFI (non CSM) option as follows:-See attachment "4.2.0V.png"*
>
> *but with current stable version of QUBE OS "Qubes-R4.1.2-x86_64.iso", 
> this issue was not replicable:- See attachment "4.1V.png"*
>
> To fix this issue, CSM support should be enabled in my motherboard BIOS, 
> but I don't have any external graphics card and and as per "
> https://www.asus.com/support/FAQ/1045467":-
>
> *Intel 500 and the latest series of chipsets do not support VBIOS display, 
> so the integrated display does not support legacy boot, use a graphics card 
> that supports VBIOS to enable CSM.*
>
> so this means, in Qube OS 4.2.0 iso file, we are forcing to enable CSM, 
> but in 4.1 version , we were not.
> I think, We should not force need of CSM support for QUBE OS 4.2.0 version 
> too.
>
> I hope, this helps to understand cause of issue.
>
> Please let me know, if any correction or any information on this please.
>
> Thanks and Regards
> Rahul
>
>
> On Tuesday, 3 October 2023 at 07:49:53 UTC-7 Tobias Killer wrote:
>
> Hi, Rahul, 
>
> your USB medium seems to be faulty. Have you checked that the image on 
> the USB medium matches the ISO image you have downloaded? 
>
> If you have a Linux machine somewhere, you can try this: 
>
> https://github.com/QubesOS/qubes-issues/issues/8556#issuecomment-1741767037 
>
> Best Regards, 
> Tobias 
>
> Am 02.10.23 um 01:53 schrieb Rahul Jain: 
> > Hi Team, 
> > 
> > Any clue on this please? 
> > 
> > Thanks and Regards 
> > Rahul 
> > 
> > On Sunday, 24 September 2023 at 16:23:31 UTC+5:30 Rahul Jain wrote: 
> > 
> > Hi Team, 
> > 
> > FYI, Attaching Rufus configuration for preparation of USB installation 
> > media. 
> > 
> > Thanks and Regards 
> > Rahul 
> > 
> > On Friday, 22 September 2023 at 15:12:33 UTC+5:30 Rahul Jain wrote: 
> > 
> > Hi Team, 
> > 
> > I am facing an Issue with "Qubes release 4.2.0-rc3":- 
> > 
> > I made installable USB media for "Qubes release 4.2.0-rc3" as detailed 
> here 
> > <https://www.qubes-os.org/doc/installation-guide/#windows-iso-to-usb> , 
> but 
> > after making this, my USB was not being detected in my UEFI BIOS boot 
> menu. 
> > 
> > This is how I made USB installable media:- 
> > 
> > [image: IMG_20230920_105540_888.jpg] 
> > 
> > I also tried making installation media using Ventoy, but with this 
> method, 
> > got many errors while startup of installation of this test Qube release 
> > version. 
> > 
> > My PC configuration is like as follows:- 
> > 
> > CPU: Intel i5 13600K 
> > <
> https://www.intel.com/content/www/us/en/products/sku/230493/intel-core-i513600k-processor-24m-cache-up-to-5-10-ghz/specifications.html>
>  
>
> > 
> > Motherboard: ASUS TUF Gaming Z790 PLUS WIFI 
> > <
> https://www.asus.com/us/motherboards-components/motherboards/tuf-gaming/tuf-gaming-z790-plus-wifi/>
>  
>
> > RAM: 32 GB 
> > SSD: 1TB 
> > 
> > so please suggest how can I install "Qubes 4.2.0.RC3" and by when, we 
> are 
> > planning to release 4.2 release? 
> > 
> > Thanks and Regards 
> > Rahul 
> > 
>
>

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