Today my laptop just randomly shut it's self down. When I went to start it back up all I get is the ACER screen and then it goes to a black screen with a flashing hyphen/underscore in the top left corner and will not go any further than that. I've googled my brains out today and to no avail, just plenty of questions asked with no real answers. I have no idea what to do. I don't have a windows repair/installation disk as my laptop didn't come with one. My laptop uses windows 7 if that helps. I've looked through bios and everything still seems fine. It just won't start windows and the black screen with the flashing hyphen will remain on the monitor no matter how long I leave it.

If this has ever happened to you or someone you know please help. Thanks.