My wife's Windows 7 computer has only one user Mary on it which is an Administrator. We are absolutely sure that neither of us has changed the password but now it will not let her log in with the password she always uses and we have tried all other possibilities we could think of to no avail.
I tried to use the Reset Password but it asked for a Password Reset Disk which she had never set up. So I went to my Windows 7 computer and created a user Mary as Administrator and created a Password Reset Disk. It seems that these disks are computer-dependent or have some other security feature as when I tried to use it on Mary's machine it just said that there was an error resetting the password (no other info).
I also tried replacing the keyboard in case it was faulty but the result is the same.
Is there a way to get access to Mary's account without reinstalling Windows as I don't think she has much (if anything) backed up?