If you're using a third party firewall and if your internet connexion is not shared, it's normal that you do'nt see alg.exe. But most people using XP integrated firewall will have that process. Wmiprvse.exe is also related to some network features I believe, but I don't know if it's meant to be loaded all the time. I can tell you I have both of those processes running on my computer now. They are safe Xp processes and you may render the computer unstable if you kill them. You should never kill a process if you don't know exactly what it is
