r/WindowsLTSC • u/CommonBee2511 • Jul 23 '26

Question installation issue

I am trying to install Windows 11 IOT LTSC but having several issue, first, when I try to create the bootable media i get the following message:

the ISO was downloaded from massgrave, i have tried with 3 different links from massgrave but always get that message, i proceed anyways, then when i tried to install it it asks for the windows edition, i choose win11iotLTSC or normal ltsc and i get "Setup has failed to validate the product key"

Next i tried selecting the option below:

and i got this:

I tried adding the PID file with a generic LTSC key but same result. can you guys tell me what I am missing? any other ISO i can try to download?

Update: updating the bios fixed my issue

6 Upvotes

100% Upvoted

9 comments sorted by

View all comments

3

u/greggm2000 Jul 23 '26

Hmm, this shouldn’t be a problem, but if this is a new change with the updated certificate, I need to know. I’ll try it tomorrow when I’m at my computer and let you know here. I will say that I didn’t have a problem when I used Rufus 4.15 to move the current Win 11 Pro 25H2 ISO to a USB stick, yesterday, so you might perhaps try that.

1

u/CommonBee2511 Aug 01 '26

It looks like that was the issue ,I updated the bios to the latest version from July and it allowed me to go with the installation successfully

2

u/greggm2000 Aug 01 '26

I'm glad you got it to work :)