Thanks for the comment Rick,
I assure you it's not. I checked that VERY carefully and every key works properly, but certain combinations of keys (exactly the same on two brand new out of the box keyboards) fail as I've noted.
The proof is in being able to replicate
every time the problem of the OP (by physically holding down F2), then releasing and it works fine. The problem is not with me accidentally holding down F2 while I press Shift-C, or that F2 is stuck. It is that occasionally I AM holding down
another key while I'm trying to type Shift-C, and this causes it to fail for the same reasons that a stuck key causes it to fail.
Maybe there are slightly different hardware versions, and my particular problem only affects some people, but this fails every time:
Hold shift > press C > press E > release C > release E
"Why are you pressing two letters at once?", I hear you say. Because that is what happens when I (and others) type quickly with the shift key held down, for example RICE becomes RICe, ECLIPSE becomes EcLIPSE, and so on. There is no other keyboard that
has ever done this for me, and believe me, in over 30 years of computer use, I've used a LOT of keyboards.
EDIT: typo