Even if you own a legitimate Windows 8 license (a retail key from 2013), installing a repack breaks the EULA because the binaries are altered. Your key will be rejected during activation.
: Repacks from unofficial sources are often flagged by Windows Defender or other security tools because they originate from untrusted sources and may contain integrated viruses or unwanted software. windows 8 highly compressed repack
In many cases, these repacks were simply vehicles for malware. Users looking for a "highly compressed" shortcut often found themselves downloading a masquerading as an installer. Instead of a sleek new OS, they got a system-wide infection that pwned their hardware before the first boot screen even appeared. The Legacy Even if you own a legitimate Windows 8
: You can still find official Windows 8.1 installation media on Microsoft's Download Page. In many cases, these repacks were simply vehicles
Some files act as "activators" or "loaders." They claim to install Windows from scratch but actually install a heavily modified version of Windows filled with bloatware, browser hijackers, and spyware that is difficult to remove.
For users with 128kbps internet connections, the prospect of downloading a full OS in minutes was irresistible. It felt like a secret hack for the "digital underground." The Reality: "The Infinite Unpack"