since it is back to the default settings it should not have username and password, have you tried just hitting enter on this? if it does not work try a blank username and "pix" as a password.
blank for username and password does not work,
blank username and cisco password does not work,
administrator username cisco does not work,
administrator username blank psswd does not work,
cisco cisco does not work either.
Instructions from http://www.informit.com/content/images/1587052148/samplechapter/1587052148content.pdf state that an ASDM applet gets downloaded and should appear. ASDM Launcher should appear, yet it does not. Kindly advise.
The following were inputed. A static IP for a computer of 192.168.1.2 has been assigned to configure the ASA.
asdm image flash:/asdm.bin
http server enable
http 192.168.1.2 255.255.255.255 inside