Few days back I have posted an article on how you can recover the lost password from windows 7 “Recover lost password of windows 7” but with that you have to go through a download of 400 mb iso file… but if you are looking for very simple software then Windows Password Unlocker will be the best but remember this is not free.. but you can test it for free (Links provided)
1. Login to a computer that can link to Internet. Download Windows Password Unlocker and install it on that PC. Note that this is a .ISO file. Burn the .ISO file to a CD or a USB flash drive.
2.Use the newly created CD/USB to the locked computer.
3. Re-booted the locked computer (it’s necessary for you to change your computer’s Setup to make it boot from CD drive or USB drive) and then followed the process of instructions. Just a few steps, the old password was removed.
4. Setting new password.
Though the method provided is very simple but if you love only the free stuffs then make your way towards the solution mentioned in the first paragraph… I hope you would like that one also and do subscribe to the feed burner subscription for daily newsletter. However you can also visit the Tricksnhacking forum for your queries and questions.
The convenient and easy way is to use some windows password recovery tool that can reset Administrator password for you within a few minutes automatically! http://digg.com/security/Windows_Password_Reset_Windows_Password_recovery_software