In case you want to download genuine Windows ISOs you can use https://tb.rg-adguard.net. It's a simple website that uses some sort of MS API to generate download links (directly from Microsoft servers). AFAIK MS does not publish checksums of their ISOs anymore, which means you have to rely on trusted sources to compare hashes, but at least it is a download directly from MS servers instread of some random torrent.

Yeah I wouldn’t trust that site. Rather, use UUPDump. It is open source, and uses the Windows update process where you can generate the ISOs yourself on your machine.

It creates links to download directly from Microsoft. I've never had an issue relying on the ISO hashes from msdn.rg-adguard.net either. I just wish Microsoft didn't hide their updated monthly ISO's behind a MSDN subscription.

I have a MSDN subscription and one of my colleges wanted a Japanese Windows 10 ISO to track down a particular bug.

While I had to login to get the link to the ISO, once I had that link there doesn't seem to be any requirements to log in again. All the installs are in trial mode unless you get a key, which does require MSDN, but it would be nice if MS just had a convenient place to find these other than people using some 3rd party service. At least it would give people confidence that it's a genuine download and not been tampered with at all.

The Windows installers are not activated. You need either an OEM key in your firmware, a retail key or a volume activation server.