It's a recent problem and I have no idea what is causing it, but whenever I press space, left shift, or left ctrl, it acts as if I had pressed, respectively, space+n (" n"), shift+n ("N"), or ctrl+n (occasionally, it opens a new tab on chrome, or a new document on Word, notepad, etc.) I have no idea what is causing this. Note that this isn't a constant thing, but something that happens on occasion.
(Add: When I press c while having the On-screen keyboard, it acts as if I had pressed alt, but pressing c with right shift does result in "C")
(Add: When I press c while having the On-screen keyboard, it acts as if I had pressed alt, but pressing c with right shift does result in "C")