Building a debloated Windows 11 ISO (Updated Oct 9, 2025)

Telesphoreo

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I decided I'd post this here for anyone who wants this guide. Windows 11 Enterprise custom built with UUPDump is by far the best way to go for a debloated and fresh Windows experience.

Step 1. Go to https://uupdump.net. Under Windows 11, select whichever edition you want. I recommend the latest, 25H2.
RR2Z69SQjy.png

Step 2. Select the latest build, make sure you select the right system architecture.
OtTsWg9uRd.png
One small note, if you see a (2), that one might be the correct one. When you actually try and build the ISO, one will say "there's been an error because the update isn't on Microsoft's servers". If that happens to you, try the other one.

On the choose edition page, only select Pro
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I personally use the following settings
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At a minimum, select include other editions and check Enterprise. You'll also need to include updates for this to work, so leave it checked.

Step 3. Download your zip and extract it

Step 4. Open ConvertConfig.ini
If you don't want Edge, set SkipEdge to 1. Note that for this to work, you do need 24H2 or newer. This option doesn't work on previous Windows 11 editions.
Set CustomList to 1
Set vDeleteSource to 1 if you do not want Windows 11 Pro in the ISO. This will speed things up in the creation of the ISO, especially if you only intend to use Enterprise

My final file for 25H2 looks like this:
INI:
[convert-UUP]
AutoStart    =1
AddUpdates   =1
Cleanup      =1
ResetBase    =0
NetFx3       =0
StartVirtual =1
wim2esd      =0
wim2swm      =0
SkipISO      =0
SkipWinRE    =0
LCUwinre     =0
LCUmsuExpand =0
UpdtBootFiles=0
ForceDism    =0
RefESD       =0
SkipLCUmsu   =0
SkipEdge     =1
AutoExit     =0
DisableUpdatingUpgrade=0
AddDrivers   =0
Drv_Source   =\Drivers

[Store_Apps]
SkipApps     =0
AppsLevel    =0
StubAppsFull =0
CustomList   =1

[create_virtual_editions]
vUseDism     =1
vAutoStart   =1
vDeleteSource=1
vPreserve    =0
vwim2esd     =0
vwim2swm     =0
vSkipISO     =0
vAutoEditions=Enterprise
vSortEditions=

Step 5. Open CustomAppsList.txt
You can now comment out the apps you don't want and uncomment the apps you want bundled. I personally comment out the following:
Diff:
- Microsoft.WindowsStore_8wekyb3d8bbwe
- Microsoft.StorePurchaseApp_8wekyb3d8bbwe
+ # Microsoft.WindowsStore_8wekyb3d8bbwe
+ # Microsoft.StorePurchaseApp_8wekyb3d8bbwe

Leave Microsoft.SecHealthUI and Microsoft.DesktopAppInstaller both selected!! You will run into issues if those aren't selected.

You can now scroll through the list and select any other apps you want. I personally like to uncomment Notepad, Windows Terminal, Paint, and Screen Sketch.
I also recommend uncommenting all of the packages under "### Media Codecs / Client non-N editions, Team edition". This gives you the codecs for various formats for free and preinstalled. This is most useful if you have an iPhone and have HEIC/HEIF photos.

Other than that, I leave everything else commented out. These files will not be included in the ISO.

Step 6. Run the "uup_download_windows.cmd" file. This will take a while, so go outside and enjoy life while it makes you the ISO. Once you have it, you can use it like any other ISO and burn it with Rufus or install it in a VM.

Note that this does not come pre-activated in any way. This is building an ISO from the files from official Microsoft files. You'll need to activate it with a genuine Windows license key.

Have fun!
 

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To update this thread, I have been using this method for over a year now. I've had my current Windows 11 Enterprise install since September 2024:
1wGSCe5B1A.png

This remains, a full year later, the foolproof way to debloat Windows 11. I still have zero Microsoft Edge and unwanted app downloads. No random Candy Crush, no Microsoft Store randomly installing, and absolutely no Edge. This is better than LTSC due to the fact that you can force the noedge.wim file in the ISO.

Despite Microsoft patching even more ways to create a local only account, you can still do it on Enterprise trouble free. Just disconnect from internet, create your local account, finish the setup, then you can connect to a network. This works even on 25H2, tested by me on Oct 9, 2025.
 
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Hi couple of questions
Why Enterprise and not Pro, especially for gaming?
Is 25H2 ready for gaming?
nash
 
Hi couple of questions
Why Enterprise and not Pro, especially for gaming?
Is 25H2 ready for gaming?
nash
Enterprise is the best choice because it's pretty much guaranteed you'll always be able to set it up with a local account.

Yes, 25H2 is good for gaming and even if it wasn't you could build this with 24H2. Anything older than 24H2 and you'll be forced to have Edge. The rest of the debloating should work nonetheless.