Upgrade HP z820 Win10 to Win 11

[CoolAudioGuy27]

Hi @Paul_Tikkanen,

I have a HP z820 that I would like to upgrade from Win10 22H2 to Win11 doing your in-place method.  My BIOS is set to Legacy mode.  What are the instructions? I see that on the previous thread you show the steps for UEFI mode.

https://h30434.www3.hp.com/t5/Notebook-Hardware-and-Upgrade-Questions/Issues-upgrading-to-windows-11...

Thanks a million,

[Paul_Tikkanen]

Hi:

If you just want to install W11 as is, watch this video:

How to install Windows 11 24H2 on Unsupported PC (Early Access)

Download the W24H2 ISO file and use that (3rd option).   

Download Windows 11 (microsoft.com)

You can download the free 7-Zip file utility from the link below.  The top line is for 64 bit.

7-Zip

You'll have to repeat this procedure each October when Microsoft rolls out the new builds because a PC that does not meet Microsoft's minimum W11 hardware requirements will never automatically get the update to the next build.

Other than that, your PC will continue to get the monthly cumulative and other updates.

That's only a minor inconvenience to have continued OS support beyond October of 2025.

Otherwise in order to run in UEFI mode, you can watch this video for how to convert the MBR installation to UEFI or you will have to clean install W10 by booting from the W10 installation media from the (U)EFI boot source, not the legacy one.

Back up your files onto a portable hard drive before attempting the MBR>GPT conversion and then if the conversion is successful, you restart the PC and disable legacy mode in the BIOS and enable secure boot.

How to Convert MBR to GPT for Free on Windows 10 without Losing Data (Easy Method)