When I turn on my Toshiba the Toshiba logo appears for a few seconds then the laptop shuts down. When I restart it several times below the logo it says "Preparing Automatic Repair" then it shuts down. If I restart it enough times a blue screen opens and says "Windows ran into a problem and needs to restart. We will restart it for you", or words to that effect. However, it never restarts. Also, sometimes after restarting a message appears saying "STOP CODE: ACPI BOIS ERROR". Again, after restarting if I keep pushing the F2 key I get the BOIS menu to come up, however, it's in a frozen state and there is no response from any of the arrow keys. Hopefully someone can help me. I am at a lose as to what the hell is going on.