For fixlets such as 'Windows 11 Business Editions version 25h2 available" .. iso version / caching question

Content Authoring
1

for fixlets such as 'Windows 11 Business Editions version 25h2 available" .. iso version / caching question:

it looks like it requires a specific ISO version - likely the initial released one: add prefetch item name =en-us_windows_11_business_editions_version_25h2_x64_dvd_41c521e7.iso sha1=bc5711df73cd6854f6715f7f8bc66e1e1fb58b7f size=7620513792 url={value of setting "_BESClient_AllowCustomRepoDownloads" of client | "http://MANUAL_BES_CACHING_REQUIRED/"}en-us_windows_11_business_editions_version_25h2_x64_dvd_41c521e7.iso sha256=2B65DF49334B64E9341DC404E9C527BF1B2A9A105E95314A347FD29AC9900581

I have the ISO for it, but it is .5 - which I assume is the 5th revision to the initial iso -

“SW_DVD9_Win_Pro_11_25H2.5_64BIT_English_Pro_Ent_EDU_N_MLF_X24-27844”

should I:

  1. just copy this fixlet to custom content, pre-cache this .5 revision, and update the sha values etc to match this version? is this less likely to work for any reason(s)?

  2. hunt down the originally intended ISO and stick with this original content? not positive if it’s still available for download or not yet.

my end goal is really just to upgrade some machines from 23h2 → 25h2 in a clean fashion. thank you!

2

it looks like the original ISO is still on the VLSC site so I was able to snag that - still curious - is it best to just deploy as-created with the original fixlet, or is it better to update it for a newer revised one?

3

Hi Nick, I’ve done both. It’s up to you but I prefer to use a current ISO build as it will alleviate the need to then having to patch the endpoint with the latest cumulative update.

The fixlet was put together using the original ISO when Win11 25H2 was released on 9/30/2025:
en-us_windows_11_business_editions_version_25h2_x64_dvd_41c521e7.iso

However if you want to use a current ISO from July 2026, then I would use the following ISO (maybe named differently in your VLSC site):
en-us_windows_11_business_editions_version_25h2_updated_july_2026_x64_dvd_7af2de2f.iso

Here are the details from my view:

image
image614×719 36.4 KB

You’ll have to adjust the action script prefetch block to reflect the correct name of this ISO and SHA1, SHA256 and size value. Also notice the references to this ISO in the action script which will need adjustment. But yes, it can be done using a custom copy of this fixlet.

-Gus