I am using a hp windows 8.1 and my hot corner is not working. My right one works but not my left... I have tried EVERYTHING and I cant check the item in the taskbar because it is shaded. I go to settings->pc->corners and it is shaded there too. not for the right I can check and uncheck that one. But the left is completely dead. PLEASE HELP

Can you try a reset and check ? 

Refer : http://windows.microsoft.com/en-au/windows-8/restore-refresh-reset-pc

Hello,

Please try out the suggestions mentioned here (specially registry fix) and see if they helps you:

http://www.kapilarya.com/fix-cant-switch-to-most-recent-app-in-windows-8-8-1-using-swipe

Let us know if this works.

Hope this helps, Good luck :)

Hi,

In addition what has been suggested, check if following registry entry exist

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\ImmersiveShell\EdgeUI

DisableTLCorner 0 for enable and 1 for disable.

If it doesnt exist, please create the new value then restart and check.

Regards,

D. Wu