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How to get product key of old OS (Win 7) after upgrading to Win 10?
Before 2 Months, I was using Windows 7 Home Premium in my Sony Vaio Laptop which is running absolutely fine. After the release of Windows 10, I upgraded and then clean install my Windows 7 to Windows 10. But after the upgrade, my laptop becomes too slow. It takes about 10 minutes to boot and 5-6 minutes to start the application.
So now i want to go back to windows 7 but now since its over 1 month, I cannot rollback to windows 7. So I want to perform the clean install the same old Windows 7 but I lost the Windows 7 product key that comes with my laptop. Also the sticker at the back of laptop where the product key is printed is erased.
Now in this difficult situation, how can i get the product key of my old windows 7 in order to install it? Is it possible?
Please help me.
Badly regretting for upgrading my Windows 7 to Windows 10.