The question has probably been asked a hundred times over, but my pen pressure just went after updating my Surface 3.

When using the surface app to test and change pen pressure it picks it up fine and so do other software like autosketch, I've tried downloading drivers but they haven't updated any so they aren't working. I remember downloading Wacom drivers at one point to help with this issue ages ago so I'm just wondering if I'll have to do something similar again.

Enable the Windows 8 Pointer API option the tablet page of the settings dialog.