did you click delete yourself?
if not, it might somehow became unregisted with the computer, so ..
if you're windows xp - go to computer > C drive > Documents and settings > (account name)
or vista/7 - go to computer > C drive > users > (account name)
if its not there you might consider getting a undelete software (UndeletePlus by TouchStone software or something)
it is win XP and I do find it there under documents and settings.
but upon switching to other user I do not have that user name as an option and it is the same in safe mode.