Windows 11

[GrayElect419]

Do I have to buy a new CPU if mine is not compatible with Windows 11

[WAWood]

@GrayElect419 

You need to know EVERYTHING that your system lacks for Windows 11, not just TPM or what the MS tool tells you.

Here is a link to a third-party tool that will check all the currently known requirements for Windows 11 and tell you what fails on your PC: https://github.com/rcmaehl/WhyNotWin11/releases

Look down the page below the illustration of the reports at the Assets section. Links to the downloads are shown there.

[Prométhée]

Hello
[This is an automatic response
so i don't have to repeat everything
Some indications can be changed, and some may not be useful to you, I can not always adapt the answer!]

the official version of windows 11 at the time of writing this answer has not yet been released, unless I'm mistaken!
Don't rush, any new version has these problems, wait at least a little bit before you start
Check everywhere if there are problems after installation or not!
For tpm 2.0, there are many sites that are starting to talk about it.
You can start by checking the general compatibility with the microsoft tool

https://www.microsoft.com/en-us/windows/windows-11
https://aka.ms/GetPCHealthCheckApp
another tool given by the expert @WAWood gives more information (thanks to him for this find
https://github.com/rcmaehl/WhyNotWin11/releases

for TPM 2.0 to be activated with bios uefi, if it is possible
"In the search box or with the Windows + R key combination, we type tpm.msc."

look at the bottom, where the TPM version is shown. If we see version 2.0, our computer should be compatible with Windows 11 in this section.
source:
https://www.netcost-security.fr/guides/guides-tech/27213/comment-activer-tpm-2-0-et-secure-boot-pour...
possibly check for product updates
>update
hi
I read that it would be more or less possible to add a module, but nothing concrete, nothing found for the moment
The security module, being generally integrated into the processor, there is no way to change this for many computers, incompatible processors!

https://www.pcmag.com/news/what-is-a-tpm-and-why-do-i-need-one-for-windows-11
The requirements for windows 11 may change, in the meantime avoid spending unnecessary money.
https://blogs.windows.com/windows-insider/2021/06/28/update-on-windows-11-minimum-system-requirement...
hp official link
https://support.hp.com/us-en/document/ish_4300937-4295746-16
[edit]update
I don't know if we can find it in English
There is something new, still a little confused, but it seems, that the requirements are still changed
There would still be certain conditions, not too uninteresting in the end if it stays like that!
The link is translated here, I don't know if it will be clear, but in the main line it should be understandable!

translate.googlews Windows 11: your PC will be able to install it, but there is .. 

update :
https://www.theverge.com/22644194/microsoft-windows-11-minimum-system-requirements-processors-change...
https://docs.microsoft.com/fr-fr/windows-hardware/design/minimum/supported/windows-11-supported-inte...
https://docs.microsoft.com/fr-fr/windows-hardware/design/minimum/supported/windows-11-supported-amd-....
As we can see in the previous link, it may be possible to install windows 11 even if the processor is not supported

update

there is the return of the microsoft check app
once downloaded and launched the scan, the result is given, for compatibility
that gives (french sorry)

if you click on specifications, a microsoft page appears

Prepare yourselves

Windows 11 isn't here yet, but will be available later this year. If you are looking forward to it, you can already do some preparations.

This PC will run Windows 11

Your PC meets the minimum hardware requirements and is eligible for a free upgrade when deploying the new Windows.

[edit]
ready ?
Download Windows 11
There are 3 options below for installing or creating Windows 11 media. Check out each one to determine the best option for you.
https://www.microsoft.com/en-us/software-download/windows11

HP PCs - Upgrading to Windows 11 using Windows Update | HP® Customer Support

HP PCs - Installing Windows 11 from a USB flash drive | HP® Customer Support

[edit]
To better understand, I tried the installation
The computer being "compatible", and offered in update with windows update
Be careful, because I haven't seen anyone mentioned this
I have a 256gb drive, there was quite a bit of space left, but during the upgrade the drive turned red.
Although I install many games on my Data player!
So I was forced to sacrifice some programs to avoid problems
information which seems to me to be quite important, take care of the available space (I had at least half of it free, if not more)!

Warning

Windows 11 on devices that don't meet minimum system requirements 
We risk having serious problems, probably updates, security problems, we do not really know what else

If the installation goes well for some, for others it can be complicated
go back to windows 10 - HP Support Community - 8200306

my laptop isnt coming on after i take it off - HP Support Community - 8238058

Re: [OMEN 17t-cb000] Windows 11 not fully compatible with BI... - HP Support Community - 8173257

Re: desktop will not boot up after attempted windows 11 upgr... - HP Support Community - 8237646

HP icore5, and generation, windows 11 installed now it won't... - HP Support Community - 8238507

Hp also might not provide any update:

HP PCs – Support for Windows 11 | HP® Customer Supportbr>

Think carefully, before taking the risk, see the experiences of other users, see if it can be interesting, or if you can wait to have a new computer later, 100% compatible!
Windows 10 remains one of the best systems, and can be used for quite a while.

I have performed the installation with a compatible computer ..
And I can not take full advantage of the more or less interesting features, because you have to have a certain material
https://www.microsoft.com/en-us/windows/windows-11-specifications
So far, so there is nothing extraordinary about this system
So if the computer is not compatible, you have little interest in using it ..
In some cases, we can have more problem than something else (performance etc), it is better to wait until most of the bugs are solved.
And even better to have a 100% compatible computer, in order to be able to take advantage of the available features
Now, if you want to give it a try, first plan to use specialized software, and make a ghost copy of your installation.