Windows and Linux

• 1). Insert your Windows installation disc. Restart the computer and, if prompted, press a key to boot from the CD. Follow the on-screen installation instructions.
  
  
• 2). Select the drive you want to install Windows to. If you want to use the same drive for your Linux installation, click the drive and select "Format Partition" or "Create New Partition" from free space. Type an amount of space to use for Windows, then create the partition. Click "Format Partition" or "Create New Partition" again to create a Linux partition and type in the amount of remaining space to use. Be sure to use at least 12,000 MB (12 GB) for the Windows installation, more if you intend to install software such as Microsoft Office.
  
  
• 3). Finish the Windows installation. Insert the Linux installation disc and restart the computer. If prompted, press a key to boot from CD. Follow the on-screen instructions for installation and select the drive you created for Linux as the installation drive.
  
  
• 4). Complete the installation. You now have both operating systems on the computer.
  
  

Mac

• 1). Download and install Apple's Boot Camp software, if you don't already have it.
  
  
• 2). Press Command+Shift+A to bring up your applications. Go to "Utilities," then double-click "Boot Camp Assistant."
  
  
• 3). Follow the on-screen instructions for installation. You will be asked to create a partition. If your second operating system will be Windows, be sure to give the new partition at least 12 GB (more if you intend to install software such as Microsoft Office).
  
  
• 4). Insert your Windows or Linux installation disc when prompted, then follow the on-screen installation instructions.
  
  
• 5). Complete the installation, then restart the computer. Your Mac will automatically boot into OS X. Hold the "Option" (Alt) key while rebooting to select your new operating system instead.