A friend and I have been building and selling laptops on the side and have come across some money situations. We have been running into people who aren't paying for the laptops at the agreed times and want to establish a fail proof method for ourselves. Basically, we want to somehow (easiest method best) be able to limit user logons for a certain time period or certain number of logons that when they reach the limit it will prompt for a password or something of that nature. Thus, if they do not pay they don't get the access information and they can no longer log onto the Laptop. Does anyone know a simple file we can create or any programming we can do to ensure that are clients have limited logon time, that requires info from us to ensure permanent usage, thus making sure we get paid?