Apr 27, · The Surface Pro 2 has it's own Windows Pro license so you can use the free upgrade to Windows 10 before the end of July. Didn't test if you can immediately install a Windows 10 because mine was upgraded last year before it was possible to use a Windows 7/ key to install Windows Feb 19, · Press the Windows Key + S, type in, and click on Activation settings. Click on Change product key. Copy and paste your product key and click Next. To verify you successfully downgraded, close, and open Activation and confirm your Edition is Windows 10 Pro. Similar: Do Cheap Windows 10 Keys Really Work?
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