and system sounds inspired by "toxic" or "radioactive" aesthetics.
To use third-party themes (visual styles) on Windows 7, you usually cannot just double-click a file. You often need to "patch" your system files first:
A common tool used to allow Windows 7 to accept custom .theme and .msstyles files.
It looks like you are searching for a specific visual theme for Windows 7 called from the software site Kuyhaa .