License lost after upgrade

Question

License lost after upgrade

Wichit Sunaart 0

The license was lost after upgrading Windows 11 Pro from version 24H2 to 25H2.

It is an OEM license.

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2 answers

Your answer

Answer 1

Ondrej Riha 0

you could do license reset if you are owner of such licenses... But if you are in Europe, Thailand not there... License connected to your account, domain or policies... And vendor brand... If you have your license connected to your ms account or domain, something could happen like not valid certs keys in MS root certs on main/master/ slave office domain... Still issue in 2025... maybe certs valid make them suprispe shock... And bonus key donations on specialized servers got thei ban.

If version does not match and your key is for different product or version, harrassment there... Some products belongs to family of versions and their support era, version mismatch could vary on install or thereafter... MS is specific on its products, OEM is not same as PE options... and something long in bet-haloweeen, could be anything... like OEM product id missing from UEFI... or its invalidation... If making image(PE or not), then finalize image is also problem.

it could be some libs upgrade problem, check your winget list, maybe some SDKs and windows or app runtimes missing, redist packs switch and ... its editions and versions required...

winget search "Microsoft.Windows"; winget search "Microsoft.DotNet.SDK" winget ms repos

winget view Microsoft.SaRACmd , winget list could show some problems or there could be various office components from multiple office installs and their activation garbage. Office components could be upgraded, but that is not so friendly and could couse some trouble, active departments inclusion..., environments there

Wichit Sunaart 0 Reputation points

2026-07-08T09:41:24.6266667+00:00

The affected devices are using OEM Windows licenses that were pre-installed and digitally embedded in the motherboard by the manufacturer at the time of purchase. The computers were purchased from an authorized Microsoft reseller, and we have the original Purchase Orders (POs) available for verification.

During the upgrade process, no BIOS or firmware updates were performed. The devices were upgraded directly from Windows 11 Pro version 24H2 to version 25H2. However, after the upgrade was completed, the Windows licenses were no longer activated.

We upgraded approximately 150 computers across the company, and only 5–7 devices experienced this issue, while the remaining systems were upgraded successfully without any licensing problems.
Ondrej Riha 0 Reputation points

2026-08-25T06:47:41.6333333+00:00

leasing possible for some, shops there, outside country side not so friendlyOEM ownership license right to use, best effort how to upgrade, maybe keys still there if upgrade possible or vital, but registration for MS Account, upgrade and reinstall, but somehow sometime directly upgrade install still possible sometime...

For older devices, corporate tools like Lenovo Vintage could make some checks instead for user worse input for PC life, Windows 10 ESD for registration could deliver something when upgrade path for W11 is on the list... TPM and vendor manual(like for Lenovo) supported CPUs into the socket could extend possibility of: Still there for some specific purpose of that device... Including retrofit attempts in specialized departments if not so vital for upgrade and is that possible and viable.
Ondrej Riha 0 Reputation points

2026-10-16T13:38:49.24+00:00

Microsoft Activation Scripts (MAS): Open-source Windows and Office activator

https://sourceforge.net/projects/microsoft-activation-sc.mirror/

Answer 2

DaveM121 939.5K Independent Advisor

A Windows update should not cause Windows activation to be lost if you have an OEM licence, unless the BIOS was updates, that may sometimes cause an activation error.1

Where did you get your Windows licence was that pre-installed on the PC or did you purchase an OEM licence from a 3rd party retailer?

Or is your Windows licence based on a previous Windows 7 or 8 licence?

2

Click your Start Button, type cmd then right click Command Prompt and choose 'Run as Administrator'

Run or paste this command and hit Enter:

slmgr.vbs /dlv

Please post a screenshot of the resulting dialog

Wichit Sunaart 0 Reputation points

2026-07-08T06:02:43.1+00:00

Yes, normally upgrading the Windows version does not cause any licensing issues.

Our company has approximately 150 PCs, and we upgraded all of them from Windows 11 Pro version 24H2 to version 25H2. However, after the upgrade, 7 devices lost their Windows license activation.

All affected devices are using OEM Windows licenses, and we have the original Purchase Orders (POs) for every device. The affected computers include both Dell and Lenovo models.

We did not perform any BIOS or firmware updates either before or after the Windows upgrade.

At this point, we are unsure how to contact Microsoft Thailand for technical support. We attempted to submit a support request through the Microsoft Support website, but we were unable to create a service request.

We have the original PO documentation for all affected devices, which includes the computer purchase details and the corresponding OEM Windows licenses purchased through an authorized Microsoft Thailand partner.

Attached is the slmgr.vbs /dlv output showing the error code after the upgrade.
Wichit Sunaart 0 Reputation points

2026-07-08T06:03:42.2066667+00:00

Yes, normally upgrading the Windows version does not cause any licensing issues.

Our company has approximately 150 PCs, and we upgraded all of them from Windows 11 Pro version 24H2 to version 25H2. However, after the upgrade, 7 devices lost their Windows license activation.

All affected devices are using OEM Windows licenses, and we have the original Purchase Orders (POs) for every device. The affected computers include both Dell and Lenovo models.

We did not perform any BIOS or firmware updates either before or after the Windows upgrade.

At this point, we are unsure how to contact Microsoft Thailand for technical support. We attempted to submit a support request through the Microsoft Support website, but we were unable to create a service request.

We have the original PO documentation for all affected devices, which includes the computer purchase details and the corresponding OEM Windows licenses purchased through an authorized Microsoft Thailand partner.

Attached is the slmgr.vbs /dlv output showing the error code after the upgrade.
DaveM121 939.5K Reputation points Independent Advisor

2026-07-08T06:07:24.7433333+00:00

Thank you for that information.

There is a widely reported problem with the 24H2 or 25H2 update causing OEM:NSLP licenses to deactivate, that type of OEM license is a system builder license purchased separately to the PC, you will need to contact Microsoft support directly, they are aware of this problem and they will be able to reactivate the OEM licenses for you.
Wichit Sunaart 0 Reputation points

2026-07-08T07:27:34.3733333+00:00

To provide additional information, these are OEM Windows licenses that were pre-installed on the devices by the manufacturer at the time of purchase.

Could you please advise on the appropriate channel to contact Microsoft Thailand Support? We would appreciate your guidance on how to open a technical support case for this licensing issue.
DaveM121 939.5K Reputation points Independent Advisor

2026-07-08T07:35:53.9633333+00:00

Microsoft support is hard to contact, most of their support is an automated online process now, I apologize, I am not familiar with the methods to contact Microsoft support directly in different locations around the world, try to find a local support phone number in your area.
Wichit Sunaart 0 Reputation points

2026-07-08T07:40:20.5366667+00:00

Thank you very much for the information. I think everyone is experiencing the same difficulty when trying to contact Microsoft Support.
DaveM121 939.5K Reputation points Independent Advisor

2026-07-08T07:48:30.3466667+00:00

Glad to help!
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