If you upgraded to Windows 10 from 8.1 and are not happy with this newly install then here is the way to roll your OS back to fresh set-up.
Note: This tips is only valid if you still in one month after the upgrade from 8.1 to 10
- Press Windows + I to open Settings windows
- Select Update & Security
- Select Recovery
- Select Go back to Windows 8.1
- Select Get started
Then you are ready to go, cheers.