No I mean on the same PC will it give me a key so I can reinstall if I have to.If you mean you can take an OEM Windows 7 install, upgrade to Windows 10, then use that Windows 10 key on other PCs, then no you can't do that, they're still classified as OEM and can only be installed to one PC.
I actually tried it myself with my Surface and my gaming desktop, it asked for a key while I did a clean install so I just used my Surface Pro key to see what happened. It activated for a few hours, then deactivated after.