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An account lockout policy will lockout an account after a certain number of failed logon attempts. So if a user is trying to guess your password, the user account will be locked out for a certain amount of time [...]

When you check Windows Defender in your vista system it may be off. When you try to opened up the security center and clicked “Turn on Now”. It went through it’s update check, reported no updates and continued to say that it was not turned on.Try this solution to fix this problem the solution try [...]

Windows Firewall is a critical first line of defense to protect your computer against many types of malicious software.Properly configured, it can stop many kinds of malware before they can infect your computer or other computers on your network. Windows Firewall, which comes with Windows Vista, is turned on by default and begins protecting your [...]

For some reason you forgot your password or another user forgot their password this will help you to reset the user password without having their old password.
click on Start>Run>and type cmd
From the command prompt window, type net users

This will show you how to Enable Lock this computer from working the Windows Security screen when you press CTRL+ALT+DEL for all user accounts on the computer. Lock is enabled in Vista and is in CTRL+ALT+DEL by default.
Method 1
Through the Local Security Policy