I have a Windows 7 virtual machine (VM). In native Win7, I am able to insert a USB drive, press F12 at bootup, choose to boot from the USB drive, and thus boot various tools relevant to the Win7 ...

There are many valid and legal reasons one might have to feel the need to download Windows 7. For instance, you might be needed to reinstall or recover Windows 7 but not find the original Windows 7 ...