SYSTEM and SYS password 11g on Windows Vista

Hello
I am having trouble. I do not know my SYSTEM and SYS passwords. I am using oracle 11g on windows vista. I tried to change the passwords but that did not work. I tried this:
c:/>sqlplus "/ as sysdba"
c:/>show user
c:/>passw system
then I changed the password. When I tried to log in the password change did not take effect. Any help would be great!

Hi,
There is no default password for sys and system in 11g.
you cna use the below command to change the system or sys password
alter user SYSTEM identified by PASWORD
same for sys
nOTE: password are case sensitive.Regards,
Taj

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