TPM from 1.2 version to 2.0 on Hp 800 G1 desktop running an i7 processor.

[Ron354]

On an 800 G1 Elite Desk running an i7 processor with TPM 1.2, how can I upgrade from Windows 10 to Windows 11? 

[Paul_Tikkanen]

Updating the TPM 1.2 security device to 2.0 is not possible in your PC.

You need an 800 G2 or newer to support that update as indicated at the link below.

HP Desktops, Notebooks, and Workstations - HP TPM Configuration Utility With Windows 10 Anniversary ...

Even if you were able to update the TPM firmware to 2.0, the processor falls way short of meeting Microsoft's minimum processor requirements to support W11, which is an Intel 8th generation core or newer processor.

Your PC should work fine on W11 regardless.

If you are interested in installing W11 on your PC as is, you can read this discussion for how I upgraded several HP and Dell notebook and desktop PC's that did not meet the W11 hardware requirements to W11 22H2/22H3.

You have to use the version of the Rufus utility that I zipped up and attached in the discussion (v3.18).

Re: Issues upgrading to windows 11 - HP Support Community - 8517912

If the in-place upgrade fails, you should be able to clean install W11 using the bootable W11 installation flash drive you made with Rufus.