title: What is a good unique PC identifier?
body: <p>I've been looking at the code in <a href="http://www.codeproject.com/KB/vb/CustomSettingsProvider.aspx" rel="noreferrer">this tutorial</a>, and I found that it uses <code>My.Computer.Name</code> to save settings that shouldn't roam between computers. It's entirely possible, however, for a user to have two identically named PCs. If they wanted to have the same username on each PC, for example, they may very well end up with two PCs named Username-PC.</p>
  
  <p>What are some good methods of identifying different PCs? Do PCs have GUIDs associated with them, or should I look into pulling the serial number off of some hardware? I don't care if the identification persists through reinstallation of Windows.</p>
  
  <p>(The tutorial I linked is in VB.Net, but I'm implementing it in C#)</p>