Preventing access to your computer

Well you might answer this question by saying that just apply password to user accounts and you are done!!! But this method is not that secure what you think as this method gives the cracker the user names in the system, and obviously if you have guest account enabled then you may have invited a big problem. For completely securing your computer you should apply the password at computer startup. Which mean when you switch on your machine it will ask you for your password. Which indeed is more secure. So here we go

1. Click Start->Run then write syskey.
2. A dialog box will appear click update over there
3. Then select the password start up in the new dialog box which came after selecting update
4. Then type in the password and confirm it and press OK.
5. You are done but don't ever forget your password else you won't be able to start your computer.