Somehow, I have a Windows 2003 Server that has two local Administrator accounts that have the same SID (S-21-xxxxxxxxx-500). Therefore, normal utilities don't let me delete them. (Can't delete a builtin account). I've tried removing them through the following means without any luck:
net user /delete compmgmt.msc wmic username rename/delete GPO to rename the administrator password recovery boot disks
I've run out of ideas. Anyone have any insight?
I'm not sure how the duplication occured but it probably has something to do with the fact that we had a GPO in place that renames the Administrator account. I'd guess that GPO was applying and something crashed. It left both accounts.