Activation Glossary

Activation Glossary

Every Windows / Office activation term you’ll see in MAS, explained in plain English.

HWID

Hardware ID activation. Generates a permanent Windows 10/11 digital license tied to your motherboard hardware hash, registered with Microsoft activation servers.

GVLK

Generic Volume License Key. Microsoft-published product key that points an installation at a KMS server instead of retail activation.

KMS

Key Management Service. A protocol where a host activates clients for 180 days; clients renew automatically while they can reach the host.

KMS38

Hijacks the gatherosstate / KMS flow to mark a Windows 10/11 install as activated until the year 2038.

Ohook

DLL hook method that permanently activates Office by intercepting the license validation calls inside SPPC/OSPP.

TSforge

MAS exclusive method that forges trust store entries to permanently activate Windows, Windows Server, ESU and Office without contacting Microsoft.

OSPP

Office Software Protection Platform. The licensing subsystem in MSI Office (ospp.vbs script lets you query, install or remove license keys).

slmgr

Software Licensing Manager. Built-in Windows script for activating, querying and managing licenses (slmgr /xpr, /dlv, /ato).

ESU

Extended Security Updates. Paid post-EOL updates for Windows 7, Windows 10 and Server editions — MAS unlocks them for free via TSforge.

LTSC

Long-Term Servicing Channel. Stripped-down Windows / Office releases (no Store, no telemetry, 10-year support). MAS fully activates them.

MAK

Multiple Activation Key. A volume license that can be used a limited number of times. Different from GVLK / KMS keys.

Digital License

Marketing name for HWID activation: license stored in Microsoft's database against your hardware hash.

Click-to-Run

Modern Office install format (C2R). Ohook is required to activate C2R Office because OSPP behaves differently than MSI Office.

0xC004C003

Activation server determined the product key is blocked. Fix with HWID or TSforge via MAS.

0x80072F8F

TLS/SSL date or certificate failure during activation. Fix your system clock and try MAS HWID again.

See the Windows Activation Guide or the Error Decoder for next steps.