If you lose your password to XP there are several ways to solve the issue but with Vista most people in this situation had to reload. Be aware If you reformat and reload data recovery is much more difficult. We can recover data without the passwords if needed.
For many, reloading Vista means losing some data and if you setup EFS then a reload is the next step. If you don’t know about EFS then 99% chance you are not using it. If you just want to get back to work we can help to reset most Vista passwords in the lab so If you cannot login to Vista contact our office. If you are not in Dallas we can arrange for you to ship your computer to the lab. Lab 972-418-2000