Ubuntu installation alongside Windows has always been relatively easy to do, however, the new computers with Windows 8 have new safety and protection mechanisms and new Bios (UEFI), that make this process a little harder.
This post will guide you through the necessary steps to achieve a successful Ubuntu installation, alongside Windows 8.
Be aware that dealing with partitions is a risky job if you don't know what you're doing. You can do permanent damages and lose data.
Step 1: Windows Backup
In the Windows Start menu type: “Windows 7 File Recovery” and select that option.
For some weird reason, although this is a Windows 8 machine, this tool is still called “Windows 7 File Recovery”.
On the left panel, select “System Repair Disk”.
And then also a “System Image”.
Make sure you complete those actions