Running Windows from an External HDD

Good evening,

I'm considering installing Windows on a partition on my external HDD, I have a Mac Book Air from 2011, my question is: will I be able to choose the boot sector in it? I don't really master Mac, on windows you'll simply define the boot order via BIOS or BootSec. Is there a guide to do this? Do I need special precautions in terms of how my external HDD is formatted, etc?

Thanks in advance

can't bootcamp only works on internal drives only if you need a windows program that doesn't require internet access you can use wineskin for mac it converts windows apps into mac apps

Really? Even if I simply install it as a separate OS on my external HDD and boot from there (ignoring Mac boot, just change the bootsec priority to the external HDD first)?

John is correct. Windows will not install on an external hard drive due to the built in anti piracy routine by Microsoft. You can, however, use virtual software (Parallels, Fusion, or VirtualBox) to run Windows on an external drive but it's not the best because it will be slow.