This computer will lock until it is turned off manually and restarted. There is not a message about having to pay 300 dollars or any other message, just the computer locked. It has never been locked and a few times it would open when just click 'ok' without entering any password. Now it hasn't been working with the 'ok'. I have run, Malwarebytes, CCleaner, Ad-Aware and Microsoft Security Essentials.
Thank You, for any ideas you may have.