Doing this would help you test Windows 8 while Windows 7 is kept on your hard drive just in case you want the old one back rather than finding your way out on the new features that Windows 8 has. Dual booting Windows 7 and Windows 8 means that you will be alerted to choose between the two operating systems whenever you turn on your computer. Yes! You can have both Windows 7 and Windows 8 together on your computer. In the case of Windows 7 and Windows 8, you don’t have to lose one to try the other.
Interested with Windows 8 but don’t want to abandon Windows 7 for now? This happens most of the time especially if the changes on the new stuff are big enough to cause confusion on new users who already got used to the old one.