If you need to do any upgrades to your computer, you might want to do them before downloading your free copy of Windows 10. While many people already have the new operating system, some of us waited. Microsoft may not recognize your system as being yours if you upgrade any major components. You may then not be able to use the same copy of the OS. You may end up having to purchase a copy. Well, at least that's how things sometimes worked with this company in the past (not recognizing your system after upgrades and wanting you to purchase another copy of the OS). Don't want to waste the freebie!