In newer machines, **UEFI** replaces the **BIOS**. UEFI allows firmware to implement a security policy called **Secure Boot**. This causes problems in dual booting machines especially with Linux.\\

__How to Disable Secure Boot__\\
You can control Secure Boot from your UEFI Firmware Settings screen in Windows 8. To access this screen, you’ll need to access the boot options menu. To do this, open the **Settings** charm — press **''Windows Key + I''** to open it — click the **''Power''** button, then press and hold the **''Shift''** key as you click **''Restart ''**.\\
Your computer will restart into the **''Advanced Boot Options''** screen. Select the **''Troubleshoot''** option, select **''Advanced options''**, and then select **''UEFI Settings''**.\\
You’ll be taken to the **''UEFI Settings''** screen, where you can choose to disable Secure Boot or add your own key.\\

__Boot From Removable Media__\\
You can boot from removable media by accessing the boot options menu in the same way — hold **''Shift''** while you click the **''Restart''** option. Insert your boot device of choice, select **''Use a device''**, and select the device you want to boot from.

After booting from the removable device, you can install Linux as you normally would or just use the live environment from the removable device without installing it.