I used to have problems with accessing saved games and so forth, so I followed the procedures from a couple posts from others that helped me resolved the issue.
I have managed to complete the game once using one character and unlocked the Hard Mode.
Now there is a whole new problem.
After playing "Hard Mode" through the streets, that just below the stairs since I didn't pick up any items reaching the police station, that I was fighting the special zombie. During this battle as 4 seconds past, the game screen turned black and I didn't know why it was doing this. Next thing that came up was the game told me "An Error Occurred" and stop responding so it gave me 2 choices to "send error report" or "do not send".
Does anyone have any idea why this problem is happening?