I am using DELL Laptop installed with Windows Vista Home Premium OS. I forgot my Login Password and would like to unlock the system to log ON.

As Microsoft suggests, you can easily reset your forgotten Windows password by using a Windows Vista password reset disk or by using an administrator account. But if you forget the administrator password and don’t have a password reset disk or another administrator account, I’ll advice you to have a try of third-party Windows password reset tool.
For freeware, Ophcrack is the best choice. This Windows password caracker enables you to crack lost Windows Vista password using the rainbow tables developed by the software developer. The recovery time is said to depend on your password strength. If you have enough time, you can try this method.
For an easier or quicker method, it’s highly suggested you to try Windows Password Unlocker Professional. This password reset tool for Windows allows you to reset lost administrator and other user passwords on Windows 8/7/XP/Vista/2008/2003/2003 in a matter of minutes. Safe and easy to use for everyone
Step 1. Download and install Windows Password Unlocker in any comptuer.
Step 2. Burn a boot password reset disk with CD/DVD or USB flash drive in seconds.
Step 3. Boot locked Vista from the burned disk and reset forgotten dell Vista password.