Apparently what happens is that after getting internet up and running, this system screen goes black and nothing is visibile with the exception of AIM. There is access to the Ctrl-Alt-Del menu but that's about it. Nothing else is acceptable. Then, all of a sudden, NT AUTHORITY wants to shut down the PC. I happened to update this Windows XP Pro (SP2) completely from my router before it went back to a routerless connection(no built in firewall). This has happened to this computer before, and it's quite annoying, we're trying to figure it out. We tried applying the patch for the NT Authority bug but apparently windows doesnt want it since it has more up to date updates. Ideas?