How to prevent my laptop from others, if that person know my laptop password?

Is there any chance to notify me through mail or sms to my mobile when my laptop is opened by others???? Please suggest me... Thanks..

If you're really crazy, you could get a thumb print reader and use that for your login. Barring that, you can lock your bios with a password, change the password on the Admin account and change your password. Although, if he really knows what he's doing there's not going to be a lot that you can do to keep him out. Basic windows security is only meant to stop a majority of people.

What you are asking for is close to impossible. To make sure your laptop is secure, always keep it with you. Don't leave it unattended. Laptop passwords for logging in will barely help. However, storing your documents in a compressed archive which is locked with strong passwords will help.