Windows 7 build 6519 was the first leaked build of Windows 7. Someone was able to hack the registry to enable the superbar which was a bulky version of the Vista Superbar. It contained big heavy icons. That design was scrapped for a new design in the late 69xx builds.
http://www.microsoftcollectionbook.com/windows/downloads/win76165191enablesuperbar.zip
- 7desktop.jpg
