|When you go to Safe Mode, is there an Administrator account which does not show when you start your computer on normal mode? This account has no password by default, and hopefully it is still using default settings.|
If you can see the Administrator account, try the following:
Go to Start > Run
Type the following command into the Run box: control userpasswords2
Select the account with the problem
Click on the Change/Reset Password option
Type a new password in the box
Confirm the new password when asked
Hopefully, you can reenter msconfig and change from booting in Safe Mode/Minimal back to booting in Normal Mode.
Restart computer and see if it works
Let us know.