How to install UEFI on Dell Inspiron 15 7559

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  1. Ztruker
    Posts : 14,046
    Windows 11 Pro X64 22H2 22621.1848
       New #11

    I suspect your flash drive is the problem. Follow this tutorial to download a new ISO and create the flash drive.

    Windows 8 and Windows 8.1 ISO - Download or Create

    See if that allows you to boot it via the UEFI boot option.

    Make sure you get the same version as what is installed.
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  3. abstract3000
    Posts : 8
    windows 10
    Thread Starter
       New #12

    jds63 said:
    O.k. well if somehow have it covered from another forum i do not know how so. Not sure what you are trying to say, the bootmgr.efi is on the windows 8.1 you copied, to put it on a USB Flash you first need to make it bootable, if was made to a dvd this would be not needed i know of.

    Attachment 65964
    In my first post I clarified I was using RUFUS 2.6, the conversation got derailed when another user wanted to know where I got the ISO from
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  4. Word Man
    Posts : 1,579
    Windows 10 Pro
       New #13

    Try this (based on how it works on my 7548) - make sure that, if you've fiddled with the BIOS settings, you first use F2 to go into BIOS setup and restore to factory default settings hit F9 to load optimized defaults. Then, with the flash drive inserted, restart and use F12 to get back to boot options screen. If the USB drive is not shown as a choice second to Windows Boot Manager, select lower down to enter setup (normal BIOS screens), then hit F10 to save settings and restart (yeah, without changing anything), NOW HIT F12 once again and see if that still inserted USB drive is NOW shown as a choice second to Windows Boot Manager.
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  6. abstract3000
    Posts : 8
    windows 10
    Thread Starter
       New #14

    Ztruker said:
    I suspect your flash drive is the problem. Follow this tutorial to download a new ISO and create the flash drive.

    Windows 8 and Windows 8.1 ISO - Download or Create

    See if that allows you to boot it via the UEFI boot option.

    Make sure you get the same version as what is installed.
    It was in fact the USB stick, 3rd one was a charm. The other 2 are USB 3.0 16&32 LEXAR's used an older PNY and that did it. Wonder whats up with the others? Anyways 8.1 installed and everything working a million times better than it did in Windows 10! The way 8.1 handles the 4K Resolution is far superior as well. Thanks!
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  7. abstract3000
    Posts : 8
    windows 10
    Thread Starter
       New #15

    Word Man said:
    Try this (based on how it works on my 7548) - make sure that, if you've fiddled with the BIOS settings, you first use F2 to go into BIOS setup and restore to factory default settings hit F9 to load optimized defaults. Then, with the flash drive inserted, restart and use F12 to get back to boot options screen. If the USB drive is not shown as a choice second to Windows Boot Manager, select lower down to enter setup (normal BIOS screens), then hit F10 to save settings and restart (yeah, without changing anything), NOW HIT F12 once again and see if that still inserted USB drive is NOW shown as a choice second to Windows Boot Manager.
    Though I got everything taken care of I will take a look at this and see if it will actually work for the New Flashdrives, thanks for the tip.
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  8. logan11
    Posts : 1
    windows 10
       New #16

    abstract3000 said:
    Though I got everything taken care of I will take a look at this and see if it will actually work for the New Flashdrives, thanks for the tip.

    how did u manage to install windows 8.1? can i get to know how did u do?
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