Windows 24h2 to old pc's. Can i install it? And how?

markw51 · Oct 21, 2024

Gregory said:
Please stop the erony.
I just simply said what I believe.
I thought we can tell our opinion and this site is a democratic site.

Where are your screenshots and proof then?

antspants · Oct 21, 2024

markw51 said:
Where are your screenshots and proof then?

Proof for what?

markw51 · Oct 21, 2024

antspants said:
Proof for what?

That the OP got it installed and working as the OP believes it should install and boot on a CPU without PopCnt.

Gregory · Oct 21, 2024

markw51 said:
It's irony and SSE4.2 not 4.1.

You must read more carefully my post.
I write what sse has the cpu I try to install the 24h2 the next days.
But as I see you don't understand that.

And cause I see a lot of irony posts I inform you that I don't gonna be answer to any ironic post at all.
Period

antspants · Oct 21, 2024

markw51 said:
That the OP got it installed and working as the OP believes it should install and boot on a CPU without PopCnt.

They didn’t say that

antspants · Oct 21, 2024

Gregory said:
You must read more carefully my post.
I write what sse has the cpu I try to install the 24h2 the next days.
But as I see you don't understand that.

Here is an article by a member here called @Ed Tittel that you might like to read.

POPCNT Fuss Is More Fizzle - Ed Tittel

Because the SSE4.2 instruction set that supports the needed capability is 15 years old, POPCNT Fuss Is More Fizzle than Nasty Surprise.

www.edtittel.com

jimbo45 · Oct 21, 2024

antspants said:
They didn’t say that

I also assumed that the hardware to install on was W11 compliant -- if it isn't then while you can get it to install you need "get arounds" so you can't then assume that a standard W11 will install.

If the OP wants to use a VHDX file on non compliant hardware - then there's zillions of posts on this Forum on how to do it -- viz : install via Dism.exe and install the W11 bootloader to an efi partition via bcdboot.exe.

Cheers
jimbo

antspants · Oct 21, 2024

jimbo45 said:
I also assumed that the hardware to install on was W11 compliant -- if it isn't then while you can get it to install you need "get arounds" so you can't then assume that a standard W11 will install.

If the OP wants to use a VHDX file on non compliant hardware - then there's zillions of posts on this Forum on how to do it -- viz : install via Dism.exe and install the W11 bootloader to an efi partition via bcdboot.exe.

Cheers
jimbo

Hi Jim.

Workarounds may be an understatement.

The OP want’s to try with a CPU that only has SSE 4.1. It makes no sense how it could be plausible to succeed since Microsoft raised the bar.

I have read of people installing it without SSE4.2 compliance (even members here somewhere)
But to my knowledge, none have succeeded to get the PC to boot into Windows 11. Rather they end up in a loop of failed load attempts and auto restarts.

spapakons · Oct 21, 2024

The OP never claimed that he did it. He just asked IF it is possible to cheat using a hybrid 23H2/24H2 USB flash drive. Yes, you CAN cheat and install 24H2, but it will not boot, unless you replace the new 24H2 bootloader that requires SSE4.2 with the old 23H2 bootloader that doesn't. See my previous reply. The thing is I haven't found time to try replacing the bootloader after every restart (assuming it doesn't hang somewhere) and see what happens. When I do and IF I succeed, of course I will post screenshots to prove and tell with detail step by step how I did it. If anyone else does it first, please posts results, Did it work? If yes, post screenshots and elaborate. If not, up to which stage you managed to go?

PS: You can also temporarily connect the hard disk to another computer with SSE4.2 and clean install Windows 11 24H2 there. After you finish and create the user account, put the hard disk back to the older computer without SSE4.2 BUT replace the bootloader or it won't boot. After doing that, does it boot into the desktop? Remember to replace the bootloader after each restart! If it does boot to the desktop, try using some apps to see if it hangs. If it doesn't post here to let us know.

antspants · Oct 21, 2024

antspants said:
Hi Jim.

Workarounds may be an understatement.

The OP want’s to try with a CPU that only has SSE 4.1. It makes no sense how it could be plausible to succeed since Microsoft raised the bar.

I have read of people installing it without SSE4.2 compliance (even members here somewhere)
But to my knowledge, none have succeeded to get the PC to boot into Windows 11. Rather they end up in a loop of failed load attempts and auto restarts.

And I think the point and proof here is actually having it work normally, without jumping through hoops to the point of a pointless achievement.
What is the good of achieving something for the point of saying I did it if you can’t even boot and load properly without the hoops? As an experiment, no problem. Other than that, it’s simply pointless. In my own opinion of course.

hsehestedt · Oct 21, 2024

spapakons said:
unless you replace the new 24H2 bootloader that requires SSE4.2 with the old 23H2 bootloader that doesn't.

Unfortunately, it is nowhere near that simple. POPCNT is used in MANY files throughout 24H2. While I don't have a file count, I would not be surprised if it were present in thousands of files. There is simply no way around this. Even if you could modify every single instance on every single file, what happens as soon as Windows update replaces a file with one that has the POPCNT instruction?

Give up. It is simply not possible to work around this. Period. End of story.

Bree · Oct 21, 2024

hsehestedt said:
If you can install 24H2 on a machine that has a CPU without SSE4.2, then successfully boot it, and prove it to my satisfaction, I will send you licenses for 2 years of Microsoft 365 Family, on me.

I guarantee that you cannot do it.....

There is a gap in the range of older CPUs I have available to test. All my Intel processors either only go up to SSE3, or have SSE4.2. I don't have one that is only SSE4.1 (hence has PopCnt). I do however have an AMD that has SSE4a with PopCnt. That one fails to boot...

Bree said:
...AMD laptop that has POPCNT, but no SSE4.2, only SSE4a. This one stalls at the Windows Logo, no spinning circle...

Windows 11 24H2 has un-bypassable hardware requirements... - post #283

spapakons · Oct 21, 2024

Most likely a computer without SSE4.2 cannot be upgraded to 24H2 and keep using 23H2 or Windows 10. For 2-5 years after EOL (depending on what the owner does with it) it should be much better than nothing if you want to keep using Windows and not switch to Linux. Some still use Windows 7 and even XP without issues. All it takes is an updated antivirus and use your brain, don't click everywhere just to get rid of the popup without even reading it!

Bree · Oct 21, 2024

spapakons said:
Some still use Windows 7 and even XP without issues. All it takes is an updated antivirus and use your brain....

I know from personal experience that Microsoft Security Essentials in Windows 7 still gets definition and scan engine updates to this day. Exactly the same ones as Windows Security. There's every chance that 23H2 and Windows 10 will continue to get theirs long after EoL or end of ESU.

antspants · Oct 21, 2024

hsehestedt said:
Unfortunately, it is nowhere near that simple. POPCNT is used in MANY files throughout 24H2. While I don't have a file count, I would not be surprised if it were present in thousands of files. There is simply no way around this. Even if you could modify every single instance on every single file, what happens as soon as Windows update replaces a file with one that has the POPCNT instruction?

Give up. It is simply not possible to work around this. Period. End of story.

You may or may not find this interesting

https://www.reddit.com/r/Windows11/comments/1e6q46g/so_how_badly_really_do_windows_11_require_the

garlin · Oct 21, 2024

antspants said:
Here is an article by a member here called @Ed Tittel that you might like to read.

POPCNT Fuss Is More Fizzle - Ed Tittel

Because the SSE4.2 instruction set that supports the needed capability is 15 years old, POPCNT Fuss Is More Fizzle than Nasty Surprise.

www.edtittel.com

Ed's articles are not very technical IMO. It would be nice to quote an expert like thebobpony or phantomofearth, who regularly scoop upcoming Windows details on X months ahead of time.

spapakons · Oct 21, 2024

Last drop of hope will vanish if I do my experiments and don't work, see my earlier post. I want to confirm it myself.

antspants · Oct 21, 2024

garlin said:
Ed's articles are not very technical IMO. It would be nice to quote an expert like thebobpony or phantomofearth, who regularly scoop upcoming Windows details on X months ahead of time.

You’re welcome to quote those people, I quoted Ed

Remember who it is I’m quoting it for

Gregory · Mar 18, 2025

This is from gemini ai from google.
I ask it if i can buypass the cpu sse4.2 at win 11 24h2 and answer me this:

Bypassing the SSE 4.2 requirement for Windows 11 24H2 involves modifying the installation process, as the operating system checks for this CPU feature during setup. Here's a breakdown of the most common method using Rufus, along with important considerations:

Using Rufus to Bypass SSE 4.2:

Rufus is a popular tool for creating bootable USB drives, and recent versions include options to bypass Windows 11's compatibility checks.

Download Rufus:
Download the latest version of Rufus from the official website (rufus.ie).
Download Windows 11 24H2 ISO:
Obtain a Windows 11 24H2 ISO file from a trusted source.
Prepare a USB Drive:
Connect a USB drive (at least 8 GB) to your computer. Be aware that all data on the USB drive will be erased.
Launch Rufus:
Run the Rufus executable.
Configure Rufus:
Device: Select your USB drive.
Boot selection: Select "Disk or ISO image" and then click "SELECT" to choose your Windows 11 24H2 ISO file.

Image option: Select "Standard Windows 11 Installation(TPM 2.0, Secure boot, and 8GB+ RAM)
Partition scheme: Choose GPT if your system uses UEFI, or MBR if it uses Legacy BIOS. You can check this in your BIOS settings.
Target system: Select UEFI (non CSM) or BIOS.
Volume label: You can change this if you want.
File system: NTFS is recommended.
Show advanced format options: leave unchecked.
Show advanced drive properties: leave unchecked.
Customize Windows Installation: this is where the bypass occurs. Check the following boxes:
"Remove requirement for 4GB+ RAM, Secure Boot and TPM 2.0"
"Remove requirement for 8GB RAM, Secure Boot and TPM 2.0"
"Remove requirement for online Microsoft account"
"Disable data collection(Skip privacy questions)"
"Disable CPU requirements(including TPM 2.0, Secure boot and CPU compatibility)" This is the crucial setting for bypassing SSE 4.2.

Start the Process:

Click "START." Rufus will warn you that all data on the USB drive will be erased. Click "OK" to proceed.

Install Windows 11:

Once Rufus has finished, you can boot your computer from the USB drive and install Windows 11.

hsehestedt · Mar 18, 2025

Gregory said:
This is from gemini ai from google.
I ask it if i can buypass the cpu sse4.2 at win 11 24h2 and answer me this

I guess that Gemini was hallucinating.

Windows 24h2 to old pc's. Can i install it? And how?

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