Suddenly the langauge bar is no longer in the task bar and when I right click on the task bar point to Toolbars -> Language Bar and click it, nothing happens the language bar doesn't show in the task bar and even the Left Alt+Shift keys are not working, I can't switch no more between input languages.
I checked in Regional & Languages Options --> Languages --> Details
and I found that the language bar under preferences is disabled, I can't click it.
So what's that thing that happend and caused my language bar to be disabled and how can I restore it back?
Thanks in advance.