When you install a new Windows operating system, you may still want to be able to boot into an OS. To access the old system, you’ll need to dual boot OS. The complexity of setting up a dual boot system depends on the operating systems that are installed
- Get information from Microsoft about the operating system. The new operating system will determine how you create a new partition and manage your boot configuration. Vista must be installed on a primary partition, and XP cannot be installed on the same partition a previous operating system.
- Purchase or download a tool like Partition Magic or GParted LiveCD to create a new partition on an existing hard drive for a Vista installation.
- Download link for a free partition software: http://download.cnet.com/EaseUS-Partition-Master-Home-Edition/3000-2248_4-10863346.html
- Install a new drive or use unpartitioned space for versions prior to Vista. Click the Start button, go to “Control Panel” and open “Administrative Tools.” Open “Computer Management” and scroll down to “Disk Management.” Find the new unpartitioned space and create a new partition.
- Put the installation CD in the CD-ROM drive. Choose the drive letter of the new partition as the destination to install to. For Windows XP, choose “New Installation” when prompted. Wait for the operating system to install. Click “Next” when prompted throughout the installation process.
- Reboot the computer once the installation is finished. Choose the operating system to boot into.
- Click the “Start” button. Go to “Control Panel” and open “System.” Click the “Advanced” tab. Click the “Startup and Recovery Settings” button. Choose the default operating system to boot to.