Running Windows 8.1 64bit.
I have noticed since a couple of days ago that my Ctrl+Tab shortcut does not work anymore. Not on text editors, not on web browsers, not on property pages, nowhere.
Ctrl+Shift+Tab (reverse tab navigation) still works.
I have checked the results on an application called "Ethervane ActiveHotkeys". In there, it states that Ctrl+Shift+Tab is not an active hotkey but that Ctrl+Tab IS. I assume that some application decided to globally pick up Ctrl+Tab for itself.
I have tried restarting (and testing as quickly as possible before all programs load), I have tried closing down all applications that the task manager will let me and still the shortcut does not work.
I'm stumped as to how to troubleshoot this further and any help would be appreciated.