I recently decided to turn off the annoying windows logon. I followed the steps below as recommended by annoyances.org. Select Run from the Start Menu, type control userpasswords2, and click Ok. Turn off the Users must enter a user name and password to use this computer option, and click Ok. After rebooting my Dell Latitude D800 the windows logon still appears but this time i am not even able to enter my correct login details?? The logon message appears - The system could not log you on. Make sure your user name and domain are correct, then type your password again. Letters in passwords must be typed using the correct case. I am not able to log on at all now. All my work is on the laptop Please can someone help??