Ok, yes. The way that works is when you start your computer, before Windows starts loading, the bootloader screen (GRUB or LILO) will come up. That allows you to select which OS you'd like to load. You can set any OS as the default and set up a timeout, so for instance, Windows will load after 10 seconds (giving you 10 seconds to select which OS you'd like).
But if all you're going to use it for is recovery, I personally would just use a Live CD or the Linux distribution of your choice - you don't have to install it, you would just boot from the CD whenever it's necessary.
That's your call though, if you'd rather install Linux to the HDD I'm not going to stop you
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