my user account disappeared on windows 7?

Hi Folks present I am running windows 7 on my PC.Two weeks back,I just shut down my system and I restart my system ,win 7 booted and also came login screen but my user accounts are not visible to me and it disappeared .Actually I had two accounts ,one is admin(krishna) and other one is non admin(others). when ever I login to my system I just use my finger print and I don’t type password..

Give me suggestions ,how can I get my user accounts on login screen