I'm running on Win XP SP3 and I typically have no trouble connecting to the campus network I'm behind. I have auto-updates configured and keep my computer up-to-date and virus-free. Last Monday I tried logging in with NAC agent and was denied access saying Windows XP needed an update. I have no optional or high priority updates to install, and I have significant reason to believe Microsoft knows more than Cisco does when it comes to its product.
I've tried checking registry issues, I've done several virus/malware scans with several different programs, checked and double-checked if windows is updated, and reinstalled NAC agent several times. I've contacted my network administrator and he was unable to provide a solution. Is this a known bug and is there an easy fix for it?