Microsoft helpfully allow you to upgrade from Windows 10 Home to Windows 10 Pro (on devices such as the Surface Go) by simply entering a new product key. The issue is, you have to purchase said key from the Microsoft store at a cost of over £90.

Not if you use the key below - this is Microsoft's publically published "defualt key" and allows you to upgrade Home to Pro without having a purchased key. It is meant for use in environments (such as large organisations) that have a KMS server, but it works just as well if you have another way of activating Windows, such as being a member of the Windows Insider Program.

Here's the key: VK7JG-NPHTM-C97JM-9MPGT-3V66T