On my home computer (that has MS Windows XP) I have accidentally pressed some key combination (what it might be?) that locked the computer. The lock screen displays current user, and number of running applications, but asks for a password.
This computer is set up to automatically login without password (I don't think that password is even set, and if it was I don't remember it). Can I go back to my running application (with unsaved data), or do I to come to terms with the loss of data?