Buoyz

i would like to ask is the 2.0 will kind of crash the whole system? This is because i left it run for 15 min, i tried to open firefox, it stated no permission to open, then i tried to open task manager, it failed to open, i tried alt-ctrl-del, it stated something that doesn't allow the request. It happened twice. So, basically i got to restart my computer using power button. Anyone has encounter this problem before?