Installing Oct 2026 update for W10 21H2 LTSC fails

[TanyaC]

Start NtLite, load base ISO 19044-1288, Go to updates, select downloaded 2026-10 KB5126657 update file, click apply, then process. When integration gets to 100% I get the error shown on image.

 

[yotoprules]

I get the same problem here on non-IOT LTSC 2021 en-GB. Tried it several times and same problem. Last month's update integrates just fine.

Integrating: KB5126657 - 2026-10 Windows 10 Security Update (ESU) 19041.7807.1.49 -> Windows 10 EnterpriseS 21H2 x64 - 10.0.19044.1288 (en-GB) - Error 0x80073713 - [14099] An advanced installer failed during setup or servicing.
The image has been damaged by an offline servicing failure and no further servicing is allowed.

 

[Carlo]

I have the same problem, anybody can suggest anythings?

 

[abbodi86]

They readded "Microsoft-Windows-Security-SPP-ExtendedSecurityUpdatesAI-Package" as part of "Microsoft-Windows-EditionSpecific-EnterpriseS-Package"
either intentionally, or by mistake

meaning, you cannot offline integrate KB5126657 to EnterpriseS, IoTEnterpriseS, EnterpriseSN

only EnterpriseG, EnterpriseEval, EnterpriseSEval remain exempted now

 

[Carlo]

What a mess! Every month, you have to make adjustments, search, figure things out, and do things over and over again.
So much wasted time.

 

[abbodi86]

2026-11 KB5131096 does not include the ESU package for EnterpriseS
so it can be integrated offlline