If I were you, I would just stay on Windows 10 Home. It's legitimate, and you probably won't ever use Pro features, especially on a tablet. That being said, the following ways will get you from Windows 10 Home to Windows 10 Pro in order of safest to least safe:
- Clean install Windows 7 Professional or Ultimate, activate with Daz's loader, and then upgrade to Windows 10 Pro. If you don't mind doing a clean install of Windows 7, this is the safest route, and you don't have to do anything else.
- Revert back to Windows 8 and update to Windows 8 Pro. After you revert back to Windows 8, you do this by inputting the generic Pro key using the Add features option of Windows 8. It will take a few minutes, but your computer will be converted to Windows 8 Pro. However, you will lose your activation, and you will need to use something like MTK to KMS-activate Windows 8 Pro. After that, you should delete AutoKMS so it doesn't interfere with Windows 10 activation later and upgrade to Windows 10 Pro. You will be converted from a 180-day KMS license on Windows 8 Pro to a permanent volume MAK license on Windows 10 Pro. Once you are on Windows 10 Pro and see that you are permanently activated, you should change your key to the generic retail key in command prompt. For Windows 10 Pro, that would be the key ending in 3V66T. You probably don't need to do this step, but it is in my opinion safer than staying on this suspicious volume MAK. After you change to the retail key, you will once again lose your activation. However, because Microsoft saved your HWID during the upgrade from Windows 8 Pro to Windows 10 Pro, it will reactivate against the retail key if you are connected to the internet.
- You could directly upgrade from Windows 10 Home to Windows 10 Pro, but you will lose your activation, and you will need to use something like MTK to KMS-activate Windows 10 Pro. I've already explained why this is an unsafe option.