Released in 2013, Windows 8.1 was Microsoft's attempt to refine the radical "Metro" design language of Windows 8. While it reintroduced a visible Start button, many users missed the transparency and detailed icon set of Windows 7. In response, enthusiasts developed icon packs and "transformation packs" to bridge this gap. Key Features of the 2013 Icon Pack
This was the heavyweight. It weighed in at 150MB because it included 850+ icons, plus the original Windows 7 sound scheme (the "Windows Balloon" sound) and the Aero cursors. Windows 7 Icon Pack By 2013 Windows 8.1