Ok so this morning i come into work to find my computer crashed and at the closing down window, but and exception had hung the process.... (I had just locked my machine last night not turned it off). So i have to hard reset the comp, i go to my event viewer and under security i see this, does anyone know what this means? Event Type: Success Audit Event Source: Security Event Category: Logon/Logoff Event ID: 538 Date: 8/10/2006 Time: 9:00:39 AM User: NT AUTHORITY\ANONYMOUS LOGON Computer: COOLER Description: User Logoff: User Name: ANONYMOUS LOGON Domain: NT AUTHORITY Logon ID: (0x0,0x519416C) Logon Type: 3 For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. well now i look a little deeper and from 8/8/06 this has been a pretty continuos thing, help please, plus there are loads of guest logins as well, i only login under the administrator, is this a trojan of some kind of a normal process? EDIT: well in delving a little deeper it seems at least three machine from within my company have tried to login to my computer, i have a drive shared on the network and a folder on another drive, does this occur when they try to access them? The strange thing is that the computers are login on to mine at like 12am in the morning and other strange times.