Is this the User Account password? I have exactly the same problem with a friends laptop running Vista. Orpcheck is one of the better programs to use on this occasion. I tried it and 2 others - all came up with 3 accounts and all showing password not found as is the case with yours.
The best option is to create a password recovery disc but it has to be done on the PC/Laptop that you are trying to recover - ie: before the problem occurs (you have to foresee this as a possibility that it can happen) so therefore it is too late for that option.
I would try running your repair disc again. Where it comes to the command prompt is it not possible to just present enter and by-pass it? Other than that I am unable to help further.
I am currently waiting for my friend to obtain/borrow a Vista install disc (the same version) to see if I can rectify his problem.