slmgr Commands — Complete Reference Guide for Windows Activation

slmgr Commands — Complete Windows Activation Reference

Every slmgr (Software Licensing Manager) command explained with syntax, purpose, and examples. The definitive quick-reference for Windows KMS activation via command line.

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Command	Purpose	Requires Admin
slmgr /ato	Trigger activation against KMS server	Yes
slmgr /xpr	Show activation expiry date	No
slmgr /dli	Display license info (summary)	No
slmgr /dlv	Display verbose license info	No
slmgr /ipk KEY	Install product/GVLK key	Yes
slmgr /skms HOST	Set KMS server address	Yes
slmgr /ckms	Clear KMS server (reset to default)	Yes
slmgr /rearm	Reset activation timer (clean slate)	Yes
slmgr /upk	Uninstall current product key	Yes
slmgr /cpky	Clear product key from registry	Yes

Command

Purpose

Requires Admin

slmgr /ato

Trigger activation against KMS server

Yes

slmgr /xpr

Show activation expiry date

slmgr /dli

Display license info (summary)

slmgr /dlv

Display verbose license info

slmgr /ipk KEY

Install product/GVLK key

Yes

slmgr /skms HOST

Set KMS server address

Yes

slmgr /ckms

Clear KMS server (reset to default)

Yes

slmgr /rearm

Reset activation timer (clean slate)

Yes

slmgr /upk

Uninstall current product key

Yes

slmgr /cpky

Clear product key from registry

Yes

Full KMS Activation Sequence

The complete set of commands to activate Windows via KMS from scratch:

> slmgr /ipk W269N-WFGWX-YVC9B-4J6C9-T83GX :: install GVLK (adjust per edition) > slmgr /skms kms.windowskms.com :: set KMS host > slmgr /ato :: activate > slmgr /xpr :: verify expiry date

Reset & Reactivate

> slmgr /rearm > slmgr /ipk W269N-WFGWX-YVC9B-4J6C9-T83GX > slmgr /skms kms.windowskms.com > slmgr /ato

What slmgr is

slmgr.vbs (Software Licensing Management tool) is the built-in Windows utility for managing activation from the command line. Every KMS activator, including KMSPico, ultimately drives the same commands — knowing them lets you activate, check, or troubleshoot manually. Run them from an elevated Command Prompt (right-click → Run as administrator).

The commands you'll use most

slmgr /ipk <key> — install a product key (e.g. an edition GVLK)
slmgr /skms <host> — set the KMS host (use 127.0.0.1 for a local host)
slmgr /ato — activate Windows now
slmgr /xpr — show the activation expiry / status
slmgr /dlv — detailed licence information
slmgr /upk — uninstall the current product key
slmgr /rearm — reset the licensing status

Putting them together

A typical manual activation is /ipk → /skms → /ato → /xpr. For Office, the equivalent script is ospp.vbs. If a command returns an error code, our activation-error index has a fix for each one, and you can confirm status any time via checking activation status.

slmgr /ato triggers Windows to attempt activation against the configured KMS server. Run this after setting a GVLK key and KMS host.

slmgr /xpr shows the current activation expiry date. If activated via KMS, it shows a date 180 days in the future. If permanently activated via digital license, it says so.

slmgr /rearm resets the Windows activation timer back to the trial state. Useful when activation is broken and you want a clean slate before re-activating.

Open Command Prompt as Administrator (right-click → Run as administrator) and type the slmgr command. slmgr must be run with elevation or it silently fails.

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