Myself: I work an IT on-site help/service desk (2nd level).
Client: HP Workstation running WinXP Pro SP3 x86 in a manufacturing role at a test station on an assembly line.
Situation: All the computers in this division run under a local user account, logged in to the computer itself. They are joined to the domain when we configure them, but are almost never logged in to the domain by the user's or supervisors.
Problem: We've found that over time these computers and workstations lose their connection to the network resources; it doesn't get updates, we can't PING it, can't remote into it, etc. The "fix" is to re-join it to the domain.
Question: What is the technical reason(s) why they drop off? And what can be done to prevent this in the future?