Have you forgotten password of your computer?no problem.You can start your computer by using a technique.The process of technique is:
01.When computer wants password, press ctrl+alt and press Delete for two times.
02.After that you will see a new window has appeared. on that window write `administrator” in user name and do it ok.You will see your computer is being started.
But if you set password at the time of set up of operating system ,that means if you set password in administrator of your computer ,it will not start. In this case you will have to set up the operating system again.
If you set password in bios of your computer:Put off the the battery of motherboard and put on it again.Now you will be able to start your computer.