Am looking to rebuild my PC this Christmas and finally upgrade the build with Windows 10. But looking on Amazon and eBay, which Windows 10 disc/USB stick version is what I need? There's OEM, upgrade, full, etc. I am looking for the version where I can use to reinstall Windows in the event of a corruption, new motherboard later down the road, etc. Don't wanna buy a one use version I guess you could say. Advice please, and thank you?