ORA-1033 (Windows Server 2012)

BTW, I posted this problem a while ago, but cannot find the thread again (Is there a way to locate one's own started discussions?)

The last thing I did was (in SQLPLus):

drop user someone cascade;

alter tablespace someone_data offline;

drop tablespace someone_data including contents and datafiles cascade constraints;

drop tablespace someone_temp;

commit;

rem exec DBMS_LOCK.SLEEP(60);

quit;

At system level (Admin rights):

net stop OracleServiceOrcl

del c:\app\kuku\oradata\orcl\someone_temp.dbf

del C:\app\kuku\oradata\orcl\someone_data.dbf

net start OracleServiceOrcl

C:\Bench\Oracle\import\  set ORACLE_SID=ORCL

C:\Bench\Oracle\import\ sqlplus system/password