1. open cmd prompt [as admin]
Then go through 3 commands
> slmgr /ipk <activation_keys>
slmgr /ipk TX9XD-98N7V-6WMQ6-BX7FG-H8Q99
> slmgr /skms kms8.msguides.com
> slmgr /ato
Some keys found in web for win10
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