when was windows 7 service pack 1 released
Windows 7 Windows 7 Service Pack 1 (SP1) was announced on March 18, 2010. A beta was released on July 12, 2010.[116][117][118] The final version was released to the public on February 22, 2011.[119] At the time of release, it was not made mandatory. It was available via Windows Update, direct download, or by ordering the Windows 7 SP1 DVD.[120] The service pack is on a much smaller scale than those released for previous versions of Windows, particularly Windows Vista.[121]
Features new to Windows 7 In previous versions of Windows, the taskbar ended with the notification area on the right-hand side. Windows 7, however, introduces a show desktop button on the far right side of the taskbar which can initiate an Aero Peek feature that makes all open windows translucent when hovered over by a mouse cursor. Clicking this button shows the desktop, and clicking it again brings all windows to focus. The new button replaces the show desktop shortcut located in the Quick Launch toolbar in previous versions of Windows.[29]