These builds are often distributed via unofficial forums or file-sharing sites and may contain malware, keyloggers, or hidden backdoors that can compromise your data.
"Windows 7 Dark Edition 2015 x64bit by Crash King" is a custom, modified version of the Windows 7 operating system . These "Dark Edition" releases are unofficial builds created by enthusiasts to offer a pre-styled, "dark mode" aesthetic that was not natively available in Windows 7. windows-7-dark-edition-2015-x64bit-by-crash-king
If you'd like to safely customize your current desktop, I can help you: Find for supported operating systems. Locate open-source tools to safely skin your UI. These builds are often distributed via unofficial forums