You can put a password on the logon computer in the following way. To start click on the "start" button, which is located in the lower left corner of the screen. You will see a menu where you will need to select "control Panel". Remember: in order to set the password, you need to on the computer was the separation of users. In the "control Panel" select "user Account".
If you have separation of multiple users, then click "Your account". If one user, the account will be the only one. So, your task is simplified. Then you and set a password. To do this, in the window that appears, type the alpha-numeric values, which will "protect" your system from intrusion. Then repeat the entered combination of characters again. Then enter the keyword or phrase that will serve as a reminder in case you forget your password. All of these steps for each of your accounts (if any) will be absolutely identical.
If you do not have a separation of user and computer access not limited to all members of the family or colleagues, you can still protect their sensitive information. To do this you just need to create their own separate from all the account under "user Accounts". And then a familiar pattern to set up a password. This way you will be able to protect your personal information from prying eyes.
As an option, the password for the login can be set already in the BIOS. This is done in order to prevent the computer to boot at all. In this case, you need to enter the BIOS at the time when the computer is undergoing testing after you enable and set a password.
Do not forget about the fact that, basically, the passwords to enter the system establishes the person who has administrator rights.
Remember that the key word or phrase that you come up with as a reminder of a forgotten password, will be visible to all users of the computer (if any) when you load the welcome screen. Where you need to enter a password.