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ERROR_SPECIAL_ACCOUNT
The target is a built-in account with special security semantics
Windows defines well-known security principals whose identities and roles are established by the operating system. ERROR_SPECIAL_ACCOUNT means the requested generic account operation is not permitted for such a built-in account. The account can be discoverable and have a valid SID, yet still reject an operation that would be allowed for an ordinary user object.
Resolve and record the SID before deciding how to handle the failure. A localized display name is a poor way to identify built-in principals, while well-known SID structures remain stable. Do not clone or recreate a same-named account as a workaround; a new user with the same label does not acquire the built-in principal’s SID or security semantics.
What to inspect
- Identify the account by SID, not only by localized name.
- Determine which specific operation is prohibited for the built-in principal.
- Use documented policy or membership configuration instead of deleting/recreating the account.
References
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