I'm about 3 weeks into my trial of Look N' Stop. I really like the firewall, so I went ahead an purchased a license for it yesterday. What will happen when (with Microsoft, it's inevitable) I wipe my hard drive and do a clean XP reinstall? When I reinstall Look'NStop, will my serial number which I received via email still work, or will the code located on the registration page be different? Will an email to Look'NStop resolve the issue? Just curious, Robert.