The bug: Tooltips for system tray (notification area) icons and task bar buttons start showing behind the taskbar so they are hidden or only partially visible.
A solution to a small bug in windows I was often annoyed: tooltips ( "hints" or "baloontips"), those little yellow rectangles begin to appear behind the taskbar or the notification area (systray ), making them difficult to read.
This happens when the explorer and the taskbar are not sure which comes first and should remain there. One solution is to reboot. Another restart explorer.exe, but it is more simple: close the active window and right click on the taskbar, and click on the properties.
Uncheck the box next to "Keep the taskbar on top of other windows". Apply and OK made. Tested normally the bug will disappear. If you do find tooltips are showing behind the taskbar, the key combination Shift+Windows+M may fix the problem.
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