System error codes will appear in software programs and in various areas within the Windows operating system after certain errors occur.
Important: A system error code is not the same as a Device Manager
error code or a browser error code, even though the error numbers may sometimes be the same.
Below is a list of system error codes from Code 12000 to Code 12099, along with a description of what the error code means.
Looking for system error codes outside of this range? See my
Complete List of System Error Codes for error code details from Code 1 to Code 15299.
Error Code 12002
System error code 12002 means "The request has timed out." This error code may also display as "ERROR_INTERNET_TIMEOUT" or as a specific value.Error Code 12003
System error code 12003 means "An extended error was returned from the server. This is typically a string or buffer containing a verbose error message. Call InternetGetLastResponseInfo to retrieve the error text." This error code may also display as "ERROR_INTERNET_EXTENDED_ERROR" or as a specific value.Error Code 12004
System error code 12004 means "An internal error has occurred." This error code may also display as "ERROR_INTERNET_INTERNAL_ERROR" or as a specific value.Error Code 12005
System error code 12005 means "The URL is invalid." This error code may also display as "ERROR_INTERNET_INVALID_URL" or as a specific value.Error Code 12006
System error code 12006 means "The URL scheme could not be recognized, or is not supported." This error code may also display as "ERROR_INTERNET_UNRECOGNIZED_SCHEME" or as a specific value.Error Code 12007
System error code 12007 means "The server name could not be resolved." This error code may also display as "ERROR_INTERNET_NAME_NOT_RESOLVED" or as a specific value.Error Code 12008
System error code 12008 means "The requested protocol could not be located." This error code may also display as "ERROR_INTERNET_PROTOCOL_NOT_FOUND" or as a specific value.Error Code 12009
System error code 12009 means "A request to InternetQueryOption or InternetSetOption specified an invalid option value." This error code may also display as "ERROR_INTERNET_INVALID_OPTION" or as a specific value.Error Code 12010
System error code 12010 means "The length of an option supplied to InternetQueryOption or InternetSetOption is incorrect for the type of option specified." This error code may also display as "ERROR_INTERNET_BAD_OPTION_LENGTH" or as a specific value.Error Code 12011
System error code 12011 means "The requested option cannot be set, only queried." This error code may also display as "ERROR_INTERNET_OPTION_NOT_SETTABLE" or as a specific value.
