Replying to My faunt got bigger

Alright, this is fucking pissing me off.  For some reason, my computer keeps pressing the control key without me even touching it.  I'll be scrolling and it'll change the font (ctrl + scroll), typing a letter such as F and it'll do a find (ctrl + F), or if I click a link it will open in a new tab (ctrl click).  I was even typing this post out, typed an R, and it refreshed the fucking page, so I had to retype it in notepad.  This isn't just firefox either, it happened a couple times in notepad and other programs too.  HELP ME NS