I manage a small network. There are twelve XP machines running off of a windows 2000 server. I have worked most of the bugs from the network since I took this job in June. I have one remaining problem which is more of a source of irritation than it is a problem. I have one machine in the domain that continues to generate a netlogon error in the system log. The event ID is 5513 and it states “The computer TOM tried to connect to the server \\SERVER using the trust relationship established by the Mr. Dell domain. However, the computer lost the security identifier (SID) when the domain was reconfigured. Reestablish the trust relationship”. I have deleted the computer from the domain (at the server console) then tried to re-add it to the domain logging on the client locally as the administrator. It gets clear through the wizard, then it tells you that the server cannot perform the required action. After this is done, you go back to the console and it shows the machine Tom with a red X through it, you reset it and the red X goes away. The problem is that after this procedure, the profile (right click on the computer TOM)of the Tom machine is missing elements like the operating system, and DNS name. I have read until my eyes have crossed, and have yet to find the combination to correct this error. I now have another problem, I lost a hard drive this week on another machine. When I try to add the new replacement, will I run into the same problem? The things I have tried are Ping the NIC, the server etc.. I have also deleted the TCP/IP settings and reinstalled them, deleted mapping. I am reluctant to delete the domain profile from the XP machine. I am at my wits end.