A hot corner is a corner of the display where if the cursor is left there a predefined action occurs (such as starting a screensaver or putting the display to sleep).

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How to disable the Start menu hot corner (bottom-left) in Windows 8

In Windows 8/8.1, when you mouse to the bottom-left corner of a screen, the Start Menu hint appears, even if you are on a monitor without a taskbar, or in a fullscreen application. How do you disable ...
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“Put display to sleep” hot corner not working

Does "put display to sleep" hot corner require some other specific settings? All hot corners work perfectly except for this one. Instead of putting the display to sleep it dimms the keyboard. What's ...