I just make changes in windows 7 ultimate edition by firing following command in cmd as an admin level
”net user administrator on”
After this my system prompt a passsword during start up (also in safe mode, with command prompt) . I does not aware about this and no any password set during windows installation. I am sole (admin)user of system mean only one account have .
Now whats the default password for computer and how i can unlock my computer.