Windows On Mac :: Left Arrow Key Moves All Way To Previous Word

There is some problem with my keyboard. Everytime I press the button k, this is what comes out: Also, everytime I press the left arrow, what happens is that instead of moving to the left for one character it moves all the way to the previous word. You may ask how I'm typing "k" now, Yes I'm using the infamous Copy-Paste. Please help me cause this problem is really irritating. By the way, on the mac, when I press k, this comes out: Ëš and the left arrow goes to the previous word. On the windows though, both keys do absolutely nothing. This is lame.