If you decide to download an AIO from a torrent site, watch for:
Geared toward home users and budget devices. Key limitations compared to Pro include the inability to join a Domain, lack of BitLocker drive encryption, and restricted Remote Desktop host capabilities.
If you must download a community AIO ISO, run this validation:
The foundation of the AIO architecture is the Windows Imaging Format (.wim). Unlike sector-based image formats (like ISO), WIM is file-based. This allows for Single Instance Storage (SIS). Because Windows 8.1 Core and Windows 8.1 Pro share approximately 95% of the same system files, the WIM format stores identical files only once in the archive.
Once you have your AIO installed, optimize it immediately.