I Google[d] for this error ORA-12560: TNS:protocol adaptor error but not able to find the actual reason and how to solve this error ? Can anyone tell me a perfect solution to solve login problem...

SQL plus doesn't show English as shown here and it also returns error for system user name and password, even the user name and password are correct! The error is ORA-12560:TNS:protocol adapter...

HI, I've just installed Oracle 10 g Express Edition on to my laptop. The platform is Windows XP SP3. Installation went normally. BUt when I try to get connected to the Oracle database via SqlPlus I...