I've had this problem a few times recently. I will start up my computer and login. After i login i hear the sound that Vista has loaded and such but all i can see is just a black screen with my mouse pointer on it. Everything loads up because i can hear the sounds of things starting and my mouse will show items are loading but i just cannot see anything. If i control+alt+delete and click show task manager sometimes it will show me the desktop but only sometimes. Does anyone know anyway to fix this?