My acer 4750g keyboard and mousepad are locked. I was just changing a document name in window explorer and suddenly I can't access both mousepad and keyboard anymore. I tried pressing Fn+F7 but my mousepad is still not working, neither my keyboard is. One more thing, the funny thing is when I reboot, my mousepad is perfectly fine, then when I type one letter into the com, both pad and keyboard can't work again.