While some have noted that Microsoft isn't restricting Windows 7 and 8.X users - whether legitimately or not - from continuing to have access to Windows 10 via the company's assistive technology offer, this key loophole is different. Paul Thurrott of also noted last week that he still was able to get Windows 10 for free using an existing product key. My ZDNet colleague Ed Bott mentioned in passing in an updated post about Windows 10 that he also was able to get Windows 10 for free after July 29 using a never-used Windows 7 Ultimate product key. Users have been able to both kick off and activate Windows 10 on machines where they've previously installed Windows 10, as well as on machines where they've never installed Windows 10 using their Windows 7/8.X product keys. Windows 11: Everything you need to know (ZDNet YouTube).The ultimate Windows 10 information hub: Everything you need in one place.Seven Windows 10 annoyances (and how to fix them).Windows 10 privacy guide: How to take control.Here's how you can still get a free Windows 10 upgrade.Windows 11: Microsoft deletes these Windows 10 features and apps.What Windows 11 means: We'll be stuck with millions of Windows 10 zombies.