I just downloaded <https://nim-lang.org/download/nim-1.4.6_x64.zip>.
Windows defender detected virus. Trojan:Win32/Wacatac.B!ml (See <https://www.microsoft.com/en-us/wdsi/threats/malware-encyclopedia-description?name=Trojan%3aWin32%2fWacatac.B!ml>) Please investigate whether your files infected by virus.