[andrewas]

You do know that that logon box dosent do anything? It dosent let you secure your computer, all it does is let you logon to networks, and then only if your running an NT domain. Which you arent.

But, if you insist, right click on network properties, select a Primary Network Logon. If that dosent do it, go into control panel and set yourself a password. Note that it wont actualy protect anything.