SP2-1503 when starting sqlplus (privilege problem)

Solution:
IF you have error like:
SP2-1503: Unable to initialize Oracle call interface
SP2-0152: ORACLE may not be functioning properly
or
SP2-0642: SQL*Plus internal error state 2165, context 4294967295:0:0
Unable to proceed

pleas check first Environment variables that you have
LD_LIBRARY_PATH=/oracle_path/client/lib
ORACLE_HOME=/oracle_path/client

NOT
LD_LIBRARY_PATH=/oracle_path/client/lib/ <-- WRONG !!!
ORACLE_HOME=/oracle_path/client/
Remember without slash ('/') at the end !!!!!!

and also check the User Account Control (UAC) in control pannel




Change the UAC from Default to Never Notify me



















-M.N.V Sudhakar