There is another way around to upgrade to Windows 10 even after 29 July but it requires to upgrade to Windows 10 before July 29 and then downgrading to the current version you are using.
Most of you know that it’s possible to activate Windows 10 using a valid Windows 7, Windows 8 or Windows 8.1 product key. Windows 10 version 1511 or above support activating using Windows 8.1/8/7 product key.
Can I activate Windows 10 using Windows 7/8.1 key after July 29, 2016?
There is a misconception that users can activate Windows 10 using Windows 7, 8.1 or 8 product key even after July 29. But according to Microsoft PC users can activate Windows 10 using Windows 7 or 8.1 product key only during the free upgrade time.
What happens to my existing Windows 10 copy activated using Windows 7/8.1 product key?
You don’t have to worry about that as your copy of Windows 10 will not be deactivated.
How to reinstall or clean install and activate Windows 10 in future (after July 29)?
If you reinstall Windows 10 after July 29 on the same PC without any major hardware changes then your copy of Windows 10 should be activated automatically. If it’s not activated then you can contact Microsoft support team using the built-in Contact support app to get your Windows 10 activated.
When you upgrade to Windows 10 using the free upgrade and activate using Windows 7/8/8.1 product key, Microsoft gives a digital entitlement to your computer. The same digital entitlement will be used to activate your Windows 10 copy again when you clean install or reinstall the operating system on the same machine.
If you have any plan to use Windows 10 in the future we recommend to update it before the free offer expires. As it has proven to be a fantastic operating system from the day one and has better updates.
The newest and last version of Windows operating system will get a number of new features and improves with the upcoming Anniversary update. Over 300 million PCs are already running Windows 10.