Why is TAB Key not working to cycle into Edit Mode? Using Blender 2.79a, Usually I cannot get into edit mode using the Tab key the first time I go to use it with any object, but after I click the "Edit Object Button" I can usually cycle back and forth from Object Mode to Edit Mode using the Tab key.

Notes:


When hitting the Tab key. Nothing happens.
This is the same with all blend files.
I have set up custom key shortcuts, but to my knowledge have not change anything to do with Edit or Object mode.


Why does this only happen sometimes? I have ruled out having anything under my tab key that would cause this issue.

Has anyone else run into this problem? Or do you have any suggestions?

Thank you in advance!
Solved

It's not enough to just restore your key config, you have to reset it, much like cegaton said.

Go to the Input panel. Hover the "Add or Remove Key-config Preset" dropdown box, and click on "Blender". Then Save User Settings

Thank you everyone.