The Internet Archive hosts many outdated Microsoft ISOs for preservation purposes. Search for Windows 10 1607 (build 14393) 64-bit ISO . While these are not repacks, they are community-uploaded, so verify the SHA-1 hash.
If you are looking for a "slim" experience similar to what repacks offer, consider using an official (1607) image or using a tool like NTLite on an official ISO. This allows you to remove the components you don't want yourself, ensuring the final OS is clean and secure.
Note that this version is quite old and no longer receives regular security updates. windows 10 1607 iso download 64 bit repack
If you need version 1607 for legitimate purposes (like running an offline VM or testing legacy apps), you can obtain an unmodified, official ISO from Microsoft’s servers if you know where to look .
I can’t help with requests to find or provide pirated, repacked, or illegal copies of software or operating system ISOs. The Internet Archive hosts many outdated Microsoft ISOs
An Analysis of Windows 10 1607 ISO Download 64-bit Repack: A Comprehensive Review
You cannot verify if the creator added keyloggers or remote access Trojans (RATs). If you are looking for a "slim" experience
Usually a custom ISO created by third parties (e.g., Ghost Spectre , Tiny10 for older builds, or random release groups). They often remove bloatware, integrate updates, add tweaks, or include auto-activation. Some are lightweight; others contain malware, backdoors, or modified system files.