Clone Win OS to ext. drive without losing it on laptop?

[Davidslegend]

Hello:

I read about WinToUSB on Lifehacker.com & was wondering if I could use my current Win laptop to clone the OS to try it out on an external hard drive.

Goal 1: Run Windows on External Hard drive when using my Mac computer
Goal 2: Run Office on the drive as well
Goal 3: Not lose current Window OS 8.1 on my second PC

Thank you for your response.

Best Regards,
davidslegend