Error installing windows 10

  kimroar 23:19 02 Jan 2018

Hi guys. Recently i updated to win10 from 7 using media creator tool from Microsoft. I clicked the install on this pc option. That went fine but i couldnt install .net something 3.5 so i decided to download the iso from media creator tool and install win10 again on USB. I dont have cd room. Now, i got error 0x8007025d when installing. I deleted every parction so I cant roll it back either. What do I do? I tried to diskpart clean but it wouldnt Even allow me. Sorry for wrong title, Windows 10 is correct.. on phone. Update! Today I tried to clean disk again and it worked one time for some reason but I still got the error code. Pls help me

  Fruit Bat /\0/\ 18:23 03 Jan 2018

The error is cause because your machine is not registered (no activation code)for win 10 on MS servers the free update has expired.

You need to purchase a win 10 serial key from MS.

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