Can't type capital z

Hi!
Got a problem here. I can't type capital z (using shift). I guess there is something blocking it, like a shortcut but I haven't found anything yet. I've tried a different keyboard but nothing. So strange. I might also tell you that I use a swedish keyboard even though it shouldn't make a difference cuz it's mostely the same as english.

Hope you can help me solve this riddle.
//Daniel