Microsoft’s free upgrade offer technically ended in 2016, but the activation servers still accept Windows 7 and 8.1 keys. If you have an old laptop sticker or a valid key:
If the watermark truly bothers you, save up for a legitimate $15-$30 OEM key from a reputable source. The few dollars spent are cheap insurance against the nightmare of identity theft or a ransomware attack. Don't let a dangerous ISO turn your PC into a hacker's playground. Windows 10 Pre Activated Iso File Download
It allows users to access the full features of Windows 10 without purchasing a retail license. Microsoft’s free upgrade offer technically ended in 2016,