KMS38 Activation


  • How to use it? Please find the instructions here.

  • This activation method activates Windows 10/11 and Windows Server (14393 and later builds), until 19 January 2038 03:14:07 UTC.

  • This activation method does not store any files on the system.

  • This activation method works offline.

  • Unlike HWID and Online KMS activation option, KMS38 does not match with any official activation method.

How does it work?

  • In a genuine KMS activation environment, activation lasts a maximum of up to 180 days. This is done using a valid license and server setup.

  • However, in the Windows major upgrade process, the system uses gatherosstate.exe to carry over the remaining KMS activation period. It does it by creating a ticket that can be used offline.

  • The trick is that we can fool the gatherosstate.exe about the remaining KMS activation period and manually put the desired period maximum up to 19 January 2038 03:14:07 UTC.

  • Why it’s limited to the year 2038?
    It’s related to the Y2K38 problem as this date (19 January 2038 03:14:07 UTC) is the maximum date we can give to gatherosstate.exe without it looping back to the year 1970.

Q: Can Microsoft block this kind of activation?
A: Not directly. They could only update Clipup to allow for a maximum activation period of 180 days. Not much besides that can be done on their part. The tickets are not sent to Microsoft at all, so they can’t block them or take action directly.

Supported Products

Windows 10/11 Generic Volume License Key
Education N 2WH4N-8QGBV-H22JP-CT43Q-MDWWJ
Enterprise NPPR9-FWDCX-D2C8J-H872K-2YT43
Enterprise N DPH2V-TTNVB-4X9Q3-TJR4H-KHJW4
Enterprise G YYVX9-NTFWV-6MDM3-9PT4T-4M68B
Enterprise G N 44RPN-FTY23-9VTTB-MP9BX-T84FV
Enterprise LTSB 2015 WNMTR-4C88C-JK8YV-HQ7T2-76DF9
Enterprise LTSC 2019 M7XTQ-FN8P6-TTKYV-9D4CC-J462D
Enterprise LTSC 2021 M7XTQ-FN8P6-TTKYV-9D4CC-J462D
Enterprise N LTSB 2015 2F77B-TNFGY-69QQF-B8YKP-D69TJ
Enterprise N LTSB 2016 QFFDN-GRT3P-VKWWX-X7T3R-8B639
Enterprise N LTSC 2019 92NFX-8DJQP-P6BBQ-THF9C-7CG2H
Enterprise N LTSC 2021 92NFX-8DJQP-P6BBQ-THF9C-7CG2H
IoT Enterprise LTSC (Windows 11) KBN8V-HFGQ4-MGXVD-347P6-PDQGT
Home TX9XD-98N7V-6WMQ6-BX7FG-H8Q99
Home Single Language 7HNRX-D7KGG-3K4RQ-4WPJ4-YTDFH
Lean NBTWJ-3DR69-3C4V8-C26MC-GQ9M6
Pro N MH37W-N47XK-V7XM9-C7227-GCQG9
Pro Education 6TP4R-GNPTD-KYYHQ-7B7DP-J447Y
Pro for Workstations NRG8B-VKK3Q-CXVCJ-9G2XF-6Q84J
Pro N for Workstations 9FNHH-K3HBT-3W4TD-6383H-6XYWF
Windows Server (LTSC) Generic Volume License Key
Windows Server 2022 Datacenter WX4NM-KYWYW-QJJR4-XV3QB-6VM33
Windows Server 2022 Standard VDYBN-27WPP-V4HQT-9VMD4-VMK7H
Windows Server 2022 Azure Core 6N379-GGTMK-23C6M-XVVTC-CKFRQ
Windows Server 2019 Datacenter WMDGN-G9PQG-XVVXX-R3X43-63DFG
Windows Server 2019 Standard N69G4-B89J2-4G8F4-WWYCC-J464C
Windows Server 2019 Essentials WVDHN-86M7X-466P6-VHXV7-YY726
Windows Server 2019 Azure Core FDNH6-VW9RW-BXPJ7-4XTYG-239TB
Windows Server 2019 ARM64 GRFBW-QNDC4-6QBHG-CCK3B-2PR88
Windows Server 2016 ARM64 K9FYF-G6NCK-73M32-XMVPY-F9DRR
Windows Server 2016 Datacenter CB7KF-BWN84-R7R2Y-793K2-8XDDG
Windows Server 2016 Standard WC2BQ-8NRM3-FDDYY-2BFGV-KHKQY
Windows Server 2016 Essentials JCKRF-N37P4-C2D82-9YXRT-4M63B
Windows Server 2016 Cloud Storage QN4C6-GBJD2-FB422-GHWJK-GJG2R
Windows Server 2016 Azure Core VP34G-4NPPG-79JTQ-864T4-R3MQX
Windows Server (Semi-Annual Channel) Generic Volume License Key
Windows Server Azure Datacenter NTBV8-9K7Q8-V27C6-M2BTV-KHMXV
20H2, 2004, 1909, 1903, and 1809
Windows Server Datacenter 6NMRW-2C8FM-D24W7-TQWMY-CWH2D
Windows Server Standard N2KJX-J94YW-TQVFB-DG9YT-724CC
Windows Server Datacenter 2HXDN-KRXHB-GPYC7-YCKFJ-7FVDG
Windows Server Standard PTXN8-JFHJM-4WC78-MPCBR-9W4KR
Windows Server Datacenter 6Y6KB-N82V8-D8CQV-23MJW-BWTG6
Windows Server Standard DPCNP-XQFKJ-BJF7R-FRC8D-GF6G4


  • X86-X64 and ARM64 architecture systems are supported.

  • Any Evaluation version of Windows (i.e. ‘EVAL’ LTSB/C) cannot be activated.

  • KMS38 only supports Windows/server version 14393 (1607) and newer versions.

  • ServerRdsh edition does not officially support activation on non-azure systems.

KMS38 - Server Cor/Acor

  • Windows Server Cor/Acor (No GUI) editions don’t have clipup.exe file.

  • To KMS38 activate it, you need to download ClipUp.exe file from the below official MS link.

  • Rename the downloaded file as ClipUp.exe and put it beside the KMS38 Activation script. That would be either MAS_AIO.cmd or KMS38_Activation.cmd

  • Activation script will check ClipUp.exe in the current folder (from where script is running) and will use it accordingly.

KMS38 Protection

  • KMS38 Activation is vulnerable to unintended replacement by a 180-Day KMS Activator.

  • From MAS 1.7, script will enable the KMS38 protection by default.

  • If you are going to use KMS_VL_ALL by abbodi1406 or MAS (Online KMS option) for Office activation, then you can choose to remove this protection.

  • Below is the explanation for how the script protect KMS38.

  • In the KMS activation method, Windows first checks the KMS IP registered as a specific KMS, and if that is not defined then it checks the Global KMS IP. Another fact is that if Localhost (IP range is defined as KMS IP in Windows 8 and later OS then Windows will not accept it as a valid KMS IP. This script simply utilizes the above facts to protect the KMS38 activation from being overwritten by any alternative ‘normal’ 180-Day KMS Activation and at the same time that KMS activator can be used for Office activation.

  • Script steps-

    • Set the Windows edition-specific KMS IP to Localhost (

    • Protect the below Registry from edit and delete

    • Done.

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SoftwareProtectionPlatform\55c92734-d682-4d71-983e-d6ec3f16059f\XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX\

Command line Switches

Manual Activation

The process here is based on Universal ticket method. Here we will create identical ticket which is used in MAS KMS38 script and activate the system with it.

slmgr /ipk <key>

  • Copy the below code all at once and enter in PowerShell to modify the gatherosstate.exe file.
$bytes  = [System.IO.File]::ReadAllBytes("C:\Files\gatherosstate.exe")
$bytes[320] = 0xf8
$bytes[321] = 0xfb
$bytes[322] = 0x05
$bytes[324] = 0x03
$bytes[13672] = 0x25
$bytes[13674] = 0x73
$bytes[13676] = 0x3b
$bytes[13678] = 0x00
$bytes[13680] = 0x00
$bytes[13682] = 0x00
$bytes[13684] = 0x00
$bytes[32748] = 0xe9
$bytes[32749] = 0x9e
$bytes[32750] = 0x00
$bytes[32751] = 0x00
$bytes[32752] = 0x00
$bytes[32894] = 0x8b
$bytes[32895] = 0x44
$bytes[32897] = 0x64
$bytes[32898] = 0x85
$bytes[32899] = 0xc0
$bytes[32900] = 0x0f
$bytes[32901] = 0x85
$bytes[32902] = 0x1c
$bytes[32903] = 0x02
$bytes[32904] = 0x00
$bytes[32906] = 0xe9
$bytes[32907] = 0x3c
$bytes[32908] = 0x01
$bytes[32909] = 0x00
$bytes[32910] = 0x00
$bytes[32911] = 0x85
$bytes[32912] = 0xdb
$bytes[32913] = 0x75
$bytes[32914] = 0xeb
$bytes[32915] = 0xe9
$bytes[32916] = 0x69
$bytes[32917] = 0xff
$bytes[32918] = 0xff
$bytes[32919] = 0xff
$bytes[33094] = 0xe9
$bytes[33095] = 0x80
$bytes[33096] = 0x00
$bytes[33097] = 0x00
$bytes[33098] = 0x00
$bytes[33449] = 0x64
$bytes[33576] = 0x8d
$bytes[33577] = 0x54
$bytes[33579] = 0x24
$bytes[33580] = 0xe9
$bytes[33581] = 0x55
$bytes[33582] = 0x01
$bytes[33583] = 0x00
$bytes[33584] = 0x00
$bytes[33978] = 0xc3
$bytes[34189] = 0x59
$bytes[34190] = 0xeb
$bytes[34191] = 0x28
$bytes[34238] = 0xe9
$bytes[34239] = 0x4f
$bytes[34240] = 0x00
$bytes[34241] = 0x00
$bytes[34242] = 0x00
$bytes[34346] = 0x24
$bytes[34376] = 0xeb
$bytes[34377] = 0x63
[System.IO.File]::WriteAllBytes("C:\Files\gatherosstatemodified.exe", $bytes)
  • Now right click on the file gatherosstatemodified.exe and goto properties and set the compatibility to Windows XP SP3.
  • Now we need to generate the ticket, to do that, enter the below command.
C:\Files\gatherosstatemodified.exe /c GVLKExp=2038-01-19T03:14:07Z`;DownlevelGenuineState=1
  • A GenuineTicket.xml file should be created in the folder C:\Files\ now let’s apply it.

clipup -v -o -altto C:\Files\

  • Check Activation Status with the following command:

slmgr /xpr

  • Done.


  • To make the exact ticket used in MAS KMS38 script, fix the time with below Powershell command and then initiate the ticket generation process as per above mentioned steps.
    $date=[datetime]"2022/10/11 12:00";while($true){set-date $date; start-sleep -milliseconds 10}

  • In the case of Windows Server Cor/Acor (No GUI) editions, the system doesn’t have clipup.exe file. So to activate it, you need to download ClipUp.exe file from the below official MS link.
    Rename the downloaded file as ClipUp.exe and put it in C:\Windows\System32 folder and then initiate the above mentioned activation process. Once the activation is done, you can remove the file.

Setup Preactivate

  • Check the Extract OEM option in the MAS Extras section if you want pre-activated Windows installation.

  • Further, read here.


  • Reach out to us on Discord (signup not required) with an error screenshot.