Solution : https://service.sap.com/sap/support/notes/625222 (SAP Service marketplace login required)
Key words :
terms connect sqlplus /, windows 2000 takes, sysdba windows 2000 8, local machines, oracle versions 8, oracle bug 2926550, nts authorization, authentication_services=, prerequisites, workaround
Related Notes :
480266 | Problems with the SYSDBA/SYSOPER/INTERNAL connect |