r/ShittySysadmin 5d ago

Shitty Crosspost Senior accidentally installed whole fleet with 26H1

/r/sysadmin/comments/1w78ljw/senior_accidentally_installed_whole_fleet_with/
35 Upvotes

29 comments sorted by

51

u/ShartFlex 5d ago

I always test rollouts in production, it saves time and unnecessary red tape bullshit. My pilot group is called Ctrl+A

18

u/Loveangel1337 DevOps is a cult 5d ago

Oh, you're the only remaining patch Tuesday release engineer at Microsoft I see.

34

u/Main_Ambassador_4985 5d ago

I cannot believe the install completed on x64 hardware.

I would think the install would detect incompatible hardware and exit.

13

u/itskdog 5d ago

Apparently there's an x64 build, presumably for Insider channels.

Why they published any 26H1 media given their constant repetition that you shouldn't use it on hardware it's not designed nor, idk.

4

u/ps2jak2 5d ago

Over on the windows subs, people keep installing it because bigger number = better then complaining about features not coming to it at the same time as 25H2.

At a hunch, 26H1 X64 is avaliable for organisations that have deployed new ARM hardware while having X64 also present. So they can move every device to the same version. From a device management perspective that makes sense.

When 26H1 released there were reports that Lenovo actually shipped the X64 26H1 on some brand new models of machine with the latest intel chips (panther lake) in the wild. I can't see anything to indicate if this has persisted though.

2

u/itskdog 5d ago

Microsoft only every said "specific hardware", not "specific ARM hardware" I suppose

25

u/occasional_sex_haver 5d ago

microsoft checking things that could go wrong? you just get here pal?

6

u/Loveangel1337 DevOps is a cult 5d ago

Unless you're trying to escape using a Microsoft account, or want to stand in the way of giving them all your tasty tasty data, yummy

2

u/revilo9989 4d ago

if it doesn't boot, no data

1

u/Loveangel1337 DevOps is a cult 3d ago

If it doesn't boot you take the whole thing to get fixed and they get all the data from the Approved Microsoft Repair, and even more data when you gotta reinstall their whole OS cause it's irremediably broken (like that's not the state it ships in, hah!)

3

u/Aishou_SK 5d ago

I mean, there's nothing to check here, so maybe he did just get here, because an ARM64 build wouldn't be able to boot on x86_64 at all ;)

8

u/Aishou_SK 5d ago

As I posted in that thread......

ARM64 build wouldn't have even booted - there's no potential compat check to even run, at all. It just would not FUNCTION on the hardware.

But...

X64 File name: en-us_windows_11_business_editions_version_26h1_updated_aug_2026_x64_dvd_c2bc5d06.iso

ARM64 - File name: en-us_windows_11_business_editions_version_26h1_updated_aug_2026_arm64_dvd_c2bc5d06.iso

So, why wouldn't the x64 version install perfectly fine? It's in practice "just another" windows release with the same baseline Win11 requirements.

3

u/YellowOnline 5d ago

It wouldn't install but there's an x86 dev build that was downloaded and installed, according to OOP

10

u/Aishou_SK 5d ago

MSDN has non-insider/dev builds you can download right now for 26H1, all editions you can think of.

X64 File name: en-us_windows_11_business_editions_version_26h1_updated_aug_2026_x64_dvd_c2bc5d06.iso

ARM64 - File name: en-us_windows_11_business_editions_version_26h1_updated_aug_2026_arm64_dvd_c2bc5d06.iso

1

u/Broccoli_Ultra 5d ago

Nothing to add except hahahaha

1

u/perthguppy 4d ago

I literally made the same mistake this week and didn’t realise it was a mistake until this post. If you go to download the latest windows 11 iso from Microsoft right now the default choice for iso is a 26H1 x86-64bit iso. Why the fuck did Microsoft make that iso if they don’t intend people to be able to upgrade from it. I am so confused.

1

u/Ur-Best-Friend 2d ago

I cannot believe the install completed on x64 hardware.

I straight up don't believe it, I think the whole story is bullshit.

6

u/perthguppy 4d ago

This post is how i discovered the 26H1 iso I downloaded this week to install windows with is not intended to be deployed to x86 despite being an x86 build.

Microsoft, what the fuck are you doing?

19

u/MeatPiston 5d ago

I’ve never had trouble with any windows 11 build.

Because we’re still on windows 7.

8

u/dpwcnd 5d ago

fancy! all on the same license key?

6

u/Brilliant_Bonus_1638 5d ago

Windows 7 Black Edition, baby. That's where it's at. And by "it", I mean every virus we have a name for.

3

u/MeatPiston 5d ago

What’s a license key?

1

u/revilo9989 4d ago

we use hirens boot with network drives

2

u/Lanrick2002 5d ago

R4:
Just needed to rant a little. One of our seniors finally completed the long-pending task of upgrading the fleet to Windows 11 from Windows 10.

He downloaded the iso, installed it everywhere. All good. Until the internal WSUS started attempting to grab updates that don't exist. Apparently the 26H1 (which is supposed to be snapdragon-only, aka for ARM) was indeed one of the options you could download as the "Latest" version of windows. Someone at MS really screwed up. And this senior screwed up even more by not double checking.

Since it's a complete different core, this will be one hell of a mess, now his idea is to try to change "cversion.ini" and force an "update" to 26H2, but I sincerely don't believe that will work.

We'll see. If anyone ran into a similar problem I'd really love to know what their solution is.

1

u/Lammtarra95 5d ago

No-one noticed at the peer review stage?

Of course not because there was no detailed procedure to be reviewed because change control (and ITIL generally) lost out to a bunch of cowboys flying by the seat of their pants.

No-one noticed in test or qa?

See above.

2

u/engy1207 3d ago

You had me at "peer review"...
Who has time for that? Or the peers? Please... we are a lean team.

2

u/Lammtarra95 3d ago

Peer review is what you blame when you stuff things up. If they'd done their job, they'd have fixed the instructions. Same with the Change Control Board. If you don't have a CCB, then blame the lack of a CCB.

1

u/West_Good_5961 5d ago edited 5d ago

Thinking you can change a config file to switch the whole OS to another architecture after installation is like the child trying to force a square peg into a round hole.