Windows 7/6.1.6519.1.winmain.071220-1525

Windows 7 build 6519 was the first build of Windows 7 to be leaked onto the Internet. It demonstrated the direction Microsoft was headed with the new taskbar, which showed larger icons for application windows, and could be enabled by using a registry key.

The appearance of the taskbar was changed in builds between 6608 and 6936.

It also replaced the Sidebar with desktop gadgets.