0x000004C5
ERROR_DUP_DOMAINNAME
The workgroup or domain name is already in use by another computer on the network.
win32decimal 1221
Matched as: the code as given (hex)
Log a case with no specific solution
Source: System Error Codes (1000-1299) - Win32 apps · CC-BY-4.0 (MicrosoftDocs/sdk-api, repo license verified 2026-10-09) · retrieved 2026-10-09