The only way to ensure your system is secure and genuine is to download it directly from Microsoft . You can install Windows 10 for free and use it without a key indefinitely (with minor cosmetic restrictions) or activate it with a genuine license later.
Microsoft’s own security tools (Windows Defender) will often flag these activators as "HackTool:Win32/AutoKMS" – and for good reason. Even if the ISO is clean today, you’re trusting an anonymous uploader with kernel-level access to your machine. Windows 10 All In One Preactivated X86 X64 Iso Google Drive