2 ways to activate Windows 10 for FREE without additional software

Run KMS commands on command prompt.

1. Open Command Prompt as administrator.
   Click on the start button, search for “cmd” then run it with administrator rights.
2. Install KMS client key
   Use the command “slmgr /ipk yourlicensekey” to install a license key (yourlicensekey is the activation key that corresponds to your Windows edition). The following is the list of Windows 10 Volume license keys.
   
   Home: TX9XD-98N7V-6WMQ6-BX7FG-H8Q99
   Home N: 3KHY7-WNT83-DGQKR-F7HPR-844BM
   Home Single Language: 7HNRX-D7KGG-3K4RQ-4WPJ4-YTDFH
   Home Country Specific: PVMJN-6DFY6-9CCP6-7BKTT-D3WVR
   Professional: W269N-WFGWX-YVC9B-4J6C9-T83GX
   Professional N: MH37W-N47XK-V7XM9-C7227-GCQG9
   Education: NW6C2-QMPVW-D7KKK-3GKT6-VCFB2
   Education N: 2WH4N-8QGBV-H22JP-CT43Q-MDWWJ
   Enterprise: NPPR9-FWDCX-D2C8J-H872K-2YT43
   Enterprise N: DPH2V-TTNVB-4X9Q3-TJR4H-KHJW4
   
   (Note: You need to hit [Enter] key to execute commands.)
   
   
1. Set KMS machine address
   Use the command “slmgr /skms kms8.msguides.com” to connect to my KMS server.
   
2. Activate your Windows
   The last step is to activate your Windows using the command “slmgr /ato”.
   Now check the activation status again.
4. Source: https://msguides.com/microsoft-software-products/2-ways-activate-windows-10-free-without-software.html