C Button doesn't work on MaCbook Pro
Suddenly when I try to type the "C" button on my MaCBook Pro it doesn't work in lower Case format... only upper Case... and not while holding ****... only while turning on the Caps loCk button.
When I hit the "C" key in lower Case mode, the "Edit" tab in Firefox is highlighted, but nothing else happens. Lower Case "C" doesn't work anymore. It's beComing quite the pain.
Can someone please advise?
I am running OS X Yosemite Version 10.10.5 whiCh is updated
MacBook Pro, Mac OS X (10.7)