Hello, I have windows xp formatted to ntfs. I am setting the permissions on the C: drive and came across a few user groups I didn't recognize "system" and "interactive". I am looking to eliminate any back door access through my workgroup and through an IIS connection. Do I need to leave these groups for my system to function properly? If I do leave them will it provide an account someone can log into through IIS when the username and password box appears? Also, is there someewhere I can look on my computer to view these groups I've never seen before? Thanks!