I cant login in my dell computers

[snug0606]

i powered on my computer and it comes to the user screen and i type my password in which is robert but it continues to tell me that im using an incorrect password. and im 100 % sure that im not typing it wrong cuz this is my computer and no one else is on it and i've never had trouble login in before. so how do i go about fixing this problem.

 

[Guest]

Ophcrack