Windows Software Licensing Management Tool (SLMGR)
Source: Command "SLMGR" from command prompt
Usage:
slmgr.vbs [MachineName [User Password]] [<Option>]
MachineName: Name of remote machine (default is local machine)
User: Account with required privilege on remote machine
Password: Password for the previous account
Global Options:
-ipk <Product Key>
Install product key (replaces existing key)
-upk
Uninstall product key
-ato
Activate Windows
-dli
Display license information (default: current license)
-dlv [Activation ID | All]
Display detailed license information (default: current license)
-xpr
Expiration date for current license state
Advanced Options:
-cpky
Clear product key from the registry (prevents disclosure attacks)
-ilc <License file>
Install license
-rilc
Re-install system license files
-rearm
Reset the licensing status of the machine
-dti
Display Installation ID for offline activation
-atp <Confirmation ID>
Activate product with user-provided Confirmation ID