Originally Posted by
StackOverflow As for your mouse, maybe it's the "touches rémanentes" (sorry for the lack of translation, I don't know the way Microsoft calls it in English). You could have activated one of the 3 available by pressing SHIFT or such keys (there are 2 more). It actives a useless functions that f*ck up the keyboard. By that I mean like you press the "A" key without cap lock or shift and it writes an uppercase "A", you press "1" and it does a "!" without shift again...
It's really troublesome and hard to get rid of. If this is the problem of course... You could always check it out.
Sorry I can't help more...