Windows 10 - What is Ctrl+Alt+F1 and how to disable it?

I've an application who offers me the shortcut Ctrl+Alt+F1

But Windows 10 opens the Task-Switcher instead. I found out, that this behaviour disappears when I kill the explorer-process, but I don't found an option yet.


This is not a default windows feature.im not 100% sure but it could be caused by additional software that comes with the Intel Graphics chip. First use task manager to kill the intel application/service:

if that works go here: and follow the answer's directions