Looking for a can be a bit tricky because, unlike the "Home" or "Pro" versions, the Enterprise edition was never meant for general consumer purchase. It was designed specifically for large organizations and IT professionals. What is Windows 8.1 Enterprise?

You will likely find many "unofficial" download links (torrents or file-sharing sites) for Windows_8.1_Enterprise_x64.iso .

Even with a clean ISO, you still need a valid KMS or MAK volume license key to activate the software. A standard Pro or Home key will not work. Recommended Alternative

Securely connect to a corporate network without a VPN. AppLocker: Control which apps and files users can run.

The ability to boot and run Windows from a USB drive.

If you are a developer or have a paid subscription, you can download the 64-bit ISO directly from the subscriber portal.

If you are an individual user looking for a stable version of Windows 8.1, it is highly recommended to use the (or the official Microsoft download page) to get the Pro version. It offers nearly all the same features for a single user and is much easier to activate and support.