This video tutorial is going to show you how to easily dual boot Windows 7 and Ubuntu 12.04. Now, the only reason you would want to do this is that you have only one computer and want to run both Ubuntu and Windows on it.
Since most Windows installations occupy the whole hard disk drive, the first thing we’re going to do is shrink the disk drive and make room to install Ubuntu.
Before you begin make sure to complete the first 3 items.
1. To get started, logon to Windows 7 and click ‘Start –> then right-click ‘Computer’ and select ‘Manage’.
2. Next, select ‘Disk Management’ and right-click the local disk (C:) then click ‘Shrink Volume’
3. Here, you can adjust the default value to your needs at least 5 Gigs or Higher. When ready click ‘Shrink’
4. After shrinking the drive, restart your computer while the Ubuntu CD/DVD is in the CD ROM.
5. When prompted, boot from the CD/DVD press the enter Key in your keyboard.
5. Click install Ubuntu. Next, choose (Something else) and click ‘Continue’
6. Then highlight the free space and click ‘Add’ to create a swap space.
7. Next, specify the swap amount to create. 500 to 1000 MB is a fair amount. Don’t forget to choose swap area. Click Ok to close the window.
8. Next, click ‘Add’ again to create Ubuntu partition and accept all the free space available. Make sure to select the slash ( / ) as the mount point.
9. Next, choose the filesystem ext4 to install Ubuntu on and click ‘Install Now’
10. Follow the wizard until you’re done. When you’re done, restart and boot from either Ubuntu or Windows.