Windows 7 was primarily intended to be an incremental upgrade to┬аMicrosoft Windows, intended to address Windows Vista's poor critical reception while maintaining hardware and┬аsoftware compatibility. Windows 7 continued improvements on┬аWindows Aero┬а(the┬аuser interface┬аintroduced in Windows Vista) with the addition of a redesigned┬аtaskbar┬аthat allows applications to be "pinned" to it, and new window management features. Other new features were added to the operating system, including libraries, the new file sharing system HomeGroup, and support for┬аmultitouch┬аinput. A new "Action Center" interface was also added to provide an overview of system security and maintenance information, and tweaks were made to the┬аUser Account Control┬аsystem to make it less intrusive. Windows 7 also shipped with updated versions of several stock applications, including┬аInternet Explorer 8,┬аWindows Media Player, and┬аWindows Media Center.