If you need Windows 10, there are legitimate methods to obtain and use it without resorting to dangerous cracks:

: If you previously owned a PC with Windows 7, 8, or 10, your license is often "digitally linked" to your hardware or Microsoft account. Simply signing in may activate the OS automatically.

: For a legal key at a lower price, many reputable third-party retailers sell OEM keys that are significantly cheaper than full retail versions.