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I cant for some reason get Windows 11 upgrade through Windows Update (see here: Windows 11 update check cached?)

I downloaded Windows 11 ISO and "burnt" it to USB. If I boot from it - it starts fresh install of Windows 11 which I dont want.

When I tried to run setup.exe from the USB in Windows 10 hoping to upgrade - it throws the error below.

If I mount the ISO without USB and run setup.exe - it works fine (but cant finish the upgrade, see here: Windows 11 upgrade using ISO - INACCESSIBLE BOOT DEVICE)

Is the USB install supposed to work as upgrade at all? Or is it only for fresh install?

enter image description here

d3dave
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Boppity Bop
  • 2,663

2 Answers2

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It is not possible to upgrade using USB option. Only a fresh update is available if you boot with USB.

Boppity Bop
  • 2,663
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INACCESSIBLE BOOT DEVICE - because Windows see USB as Removable device. If you can set zero this bit that windows will see USB-HDD. But this isn't good decision. Because windows see Fat32 first partition of USB.

  • Step 1 to do first partition of NTFS and write to first partition windows distributive.
  • Step 2 to do second partition as Fat32, bootable, active and write on second partition GRAB loader (syslinux for example), write to grldr load bootldr from first partition (grldr see NTFS).

This is to do possible normal write, read install.wim sizing 5.3 Gb (Fat32 can work with files sizing less 4Gb)

Toto
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Nick
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