I don't know if I'm posting in the right section, sorry if I'm not. I need some help. I don't know for sure what caused the problem, but it happened after I prompted a registry cleaner to defragment the registry. It would have to reboot 2 times to complete the process, but after it rebooted twice, it wouldn't start up. It would just remain on the Acer screen (it comes up after the black windows screen loads, it's light blue and has a little design on it). So, to turn it off, I pressed the power until it turned off. I turned it on again, and a black screen appears saying something like "We are sorry for the inconvenience, but Windows did not start correctly" and it gives me options to start on safe mode, start of last known (configuration?), or start windows normally. When I pick safe mode, the screen remains black with the words "safe mode" in the corners and windows xp... on the top. And it stays that way. Nothing happens. When I choose "start windows normally" or "last known", the black windows screen appears and windows loads, then it goes to the Acer screen I described earlier and it stays there. Nothing happens but I can move the mouse. Does anyone know what might the problem be and how to fix it? This is the first problem I've had with the laptop and I've had it for a year. Thanks!