Windows Hello works perfectly and smoothly when using Surface Pro as a tablet or a laptop, the only minor issue being the facial recognition features because you need to turn your head if the tablet is connected to a dock alongside a larger monitor. That's why, after they started shipping out the devices last week, Microsoft chose to make a recovery image file available to buyers so they can easily downgrade back to Windows 10 S if they feel Windows 10 Pro is draining the battery too fast or for any other reason.
Microsoft has released an official recovery image of Windows 10 S which is now available from its support page. As the recovery image restores the Surface Laptop to its factory state, all files and settings are wiped out, so a full backup will be needed so that you can restore everything you might desire. You can just follow the instructions that appear throughout the process. Microsoft did not allow this previously, but it's now possible to downgrade Windows 10 S to Windows 10 Pro.
Notably, Microsoft originally wasn't going to give users the option of switching back to Windows 10 S after upgrading to Windows 10 Pro.
It's odd that Microsoft would offer free upgrades to Windows 10 Pro.
The verdict then regarding the Surface Laptop is that it can not be repaired without causing considerable damage to the notebook.
The initial upgrade might be tempting to folks who've shelled out close to £1,000 for the Surface Laptop, once they realise the only way to install apps is through the Windows Store. Would you do us a favor?