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You've got (new) apps
In Windows 8, installing any new desktop program or Windows Store app added that program's icons to the Start screen, resulting in icon overload. Windows 8.1 changed that behavior so that the new program's icons were added to Apps view but not automatically pinned to Start. That led to a different sort of confusion, with users puzzled over how to find the newly installed apps. The spring 2014 update adds a notification at the bottom of the Start screen, alongside the arrow that leads to Apps view. On the Apps screen, icons for newly installed apps are marked with a bright label that reads "New."
Disk space at a glance
One of the few changes in PC settings with Windows 8.1 Update 1 is this new pane under the PC and Devices entry. The Disk Space list shows which types of files are gobbling up the most disk space and offers a button for emptying the Recycle Bin.