Is there a way to dual boot win7 and linux on laptop without partitioning?

Is there a way to dual boot win7 and linux on laptop without partitioning? Topic: Is there a way to dual boot win7 and linux on laptop without partitioning?
May 23, 2019 / By Benjamina

Question: Windows 7 is already installed on laptop. I want to attach an empty external hard-drive to the laptop and install Linux on it, but here's the catch....when booting up the laptop i want it to act two different ways depending on whether or not the external hard drive is attached to the laptop or not. When the external hard-drive is attached i want a boot screen to appear so i can choose Linux or windows. when the external hard-drive is not attached, i want it to automatically boot into windows. how can i make that happen? whatever the case may be, what i don't want to have happen is, after installing 2nd operating system on external drive, my master boot record will be written differently on my laptop's hard-drive, then if i try booting up the laptop without the external hard-drive attached, i might get errors telling me that something is missing. how can i avoid that?

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