I am trying to install Oracle 9i (3 CDs) on my desktop, configuration is around 0.99 GB ram, more 12 GB disk space, Windows XP. While installing I'm not able to install DBCA & thus not able to create any passwords. At the time of installation, I got two errors which I ignored & continued. After installation is complete, it shows Database Configuration Assistant failed to install. Now I'm not able to connect to SQL Plus. It is showing TNS: protocol adapter error. Please anybody can help me?