Hi all, I'm having problems with my Windows 8.1 personalisation. When I go to PC Settings with charms bar, it takes me to the modern settings, but I can't change anything regarding personalisation. I can't change lock screen (I can, but it just shows as it's changed, but it doesn't change for real). I can't edit my default color scheme, there's no that setting anywhere. What could be wrong with my Windows 8?