ORA-12560: TNS Protocol adapter error on Windows

ORA-12560: TNS Protocol adapter error

if you tried you connect database, it seems to be create a service,
open command prompt and run "oradim"

if you are going to create new db, service should be in started.
orelse
create new service like
C:\> oradim   -NEW -SID [dbname]-SYSPWD [syspassword] -STARTMODE auto
Instance started.


Now you can connect.