Three days ago I upgraded to ubuntu 16.04 lts and for three days it worked perfectly. However today Ubuntu refused to load. I recieved a screen with options, the first two did not work at all ( Ubuntu and Ubuntu startup ) the third option - Ubuntu recovery - worked, but, on reaching this point it asks:
please unlock disk sda3-crypt
I cannot enter the password, I type and nothing happens. I do not know why this has happened, as I said everything was running just fine. My job depends on my connection to the internet and for me this is serious. Please can anyone help me ?