Old Tray, New Tricks: Windows 7's Taskbar and window management tweaks are nice. But its changes to the System Tray - aka the Notification Area - have a huge positive effect.
Changes in Windows 7 transform the System Tray from an intrusive eyesore (in Windows Vista) into a useful set of shortcuts and other controls. In the past, no feature of Windows packed more frustration per square inch than the System Tray. It quickly grew dense with applets that users did not want in the first place, and many of the uninvited guests employed word balloons and other intrusive methods to alert users to uninteresting facts at inopportune moments. At their worst, System Tray applets behaved like belligerent squatters, and Windows did little to put users [PARTICLE] in charge. In Windows 7, applets can't pester you unbidden because software installers can't dump them into the System Tray. Instead, applets land in a holding pen that appears only when you click it, a much-improved version of the overflow area used in previous incarnations of the Tray. Applets in the pen can't float word balloons at you unless you permit them to do so. In Windows 7, applets can't pester you unbidden because software installers can't dump them into the System Tray. Instead, applets land in a holding pen that appears only when you click it, a much-improved version of the overflow area used in previous incarnations of the Tray. Applets in the pen can't float word balloons at you unless you permit them to do so. It's a cinch to drag them into the System Tray or out of it again, so you enjoy complete control over which applets reside there. More good news: Windows 7 largely dispenses with the onslaught of word-balloon warnings from the OS about troubleshooting issues, potential security problems, and the like. A new area called Action Center - a revamped version of Vista's Security Center - queues up such alerts so you can deal with them at your convenience. Action Center does issue notifications of its own from the System Tray, but you can shut these off if you don't want them pestering you. All of this helps make Windows 7 the least distracting, least intrusive Microsoft OS in a very long time. It's a giant step forward from the days when Windows thought nothing of interrupting your work to inform you that it had detected unused icons on your desktop.
(Adapted from http://www.pcworld.com/article/172602/windows_7_review.html)
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