Start your computer and insert bootable DVD in DVD drive......
Select DVD Rom in boot menu and press enter.....
Now computer start booting from bootable DVD of Ubuntu.....
Now click on Install Ubuntu.....
Now select updates and third party software and click on continue.....
If you want to install Ubuntu with Windows (Dual Boot) then select alongside Windows and click on continue.....
If you want to Upgrade your Ubuntu OS then select Upgrade Ubuntu and click on Install Now.....
If you want to fresh installation then select Erase disk and click on continue.....
Now select disk and click on Install Now.....
Now click on map of India and select Kolkata and click on continue.....
Now select keyboard layout as English (US).....
Now write your computer name, username, password and click on continue.....
Now you sit back and see progress bar of OS instalation.....
At last click on Restart Now for complete installation.....
After restart computer give password of user account if asked.....
Now you successful logging your account and enjoy your Ubuntu.....
